Remote debugging can now be enabled via brave://settings/privacy

Default for this is FALSE (meaning remote debugging is disabled). Setting is global
(using local_state), not per-profile.

Fixes brave/brave-browser#5640
Fixes brave/brave-browser#3199

app/brave_generated_resources.grd

@@ -393,6 +393,10 @@ By installing this extension, you are agreeing to the Google Widevine Terms of U
       <message name="IDS_SETTINGS_PUSH_MESSAGING" desc="Select value">
         Use Google Services for Push Messaging
       </message>
+      <!-- Remote Debugging -->
+      <message name="IDS_SETTINGS_REMOTE_DEBUGGING_TITLE" desc="Select value">
+        Remote debugging
+      </message>
       <!-- Brave Sync Settings -->
       <message name="IDS_SETTINGS_BRAVE_SYNC_TITLE" desc="The title for Brave Sync in settings">
         Sync

browser/brave_local_state_prefs.cc

@@ -9,13 +9,14 @@
 #include "brave/browser/brave_stats_updater.h"
 #include "brave/browser/metrics/metrics_reporting_util.h"
 #include "brave/browser/tor/buildflags.h"
+#include "brave/common/pref_names.h"
 #include "brave/components/brave_referrals/buildflags/buildflags.h"
 #include "brave/components/brave_shields/browser/ad_block_service.h"
 #include "brave/components/brave_shields/browser/brave_shields_p3a.h"
-#include "brave/components/p3a/buildflags.h"
 #include "brave/components/p3a/brave_p3a_service.h"
-#include "chrome/common/pref_names.h"
+#include "brave/components/p3a/buildflags.h"
 #include "chrome/browser/first_run/first_run.h"
+#include "chrome/common/pref_names.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "third_party/widevine/cdm/buildflags.h"
@@ -41,6 +42,7 @@ namespace brave {
 void RegisterLocalStatePrefs(PrefRegistrySimple* registry) {
   brave_shields::RegisterPrefsForAdBlockService(registry);
   RegisterPrefsForBraveStatsUpdater(registry);
+  registry->RegisterBooleanPref(kRemoteDebuggingEnabled, false);
 #if BUILDFLAG(ENABLE_BRAVE_REFERRALS)
   RegisterPrefsForBraveReferralsService(registry);
 #endif

browser/resources/settings/brave_privacy_page/brave_personalization_options.html

@@ -48,6 +48,12 @@
         </cr-button>
       </template>
     </settings-toggle-button>
+    <settings-toggle-button id="remoteDebuggingEnabled"
+        pref=""
+        checked="[[remoteDebuggingEnabled_]]"
+        label="$i18n{remoteDebuggingEnabledTitle}"
+        on-settings-boolean-control-change="onRemoteDebuggingEnabledChange_">
+    </settings-toggle-button>
   </template>
   <script src="brave_personalization_options.js"></script>
 </dom-module>

browser/resources/settings/brave_privacy_page/brave_personalization_options.js

@@ -23,7 +23,8 @@ Polymer({
     },
 
     webRTCPolicy_: String,
-    p3aEnabled_: Boolean
+    p3aEnabled_: Boolean,
+    remoteDebuggingEnabled_: Boolean
   },
 
   /** @private {?settings.BravePrivacyBrowserProxy} */
@@ -46,6 +47,9 @@ Polymer({
     this.browserProxy_.getP3AEnabled().then(enabled => {
       this.p3aEnabled_ = enabled;
     });
+    this.browserProxy_.getRemoteDebuggingEnabled().then(enabled => {
+      this.remoteDebuggingEnabled_ = enabled;
+    });
   },
 
   /**
@@ -65,7 +69,11 @@ Polymer({
   onP3AEnabledChange_: function() {
     this.browserProxy_.setP3AEnabled(this.$.p3aEnabled.checked);
   },
-
+
+  onRemoteDebuggingEnabledChange_: function() {
+    this.browserProxy_.setRemoteDebuggingEnabled(this.$.remoteDebuggingEnabled.checked);
+  },
+
   shouldShowRestart_: function(enabled) {
     return enabled != this.browserProxy_.wasPushMessagingEnabledAtStartup();
   },

browser/resources/settings/brave_privacy_page/brave_privacy_page_browser_proxy.js

@@ -21,6 +21,14 @@ cr.define('settings', function() {
      * @param {boolean} enabled (true/false).
      */
     setP3AEnabled(value) {}
+    /**
+     * @return {!Promise<string>}
+     */
+    getRemoteDebuggingEnabled() {}
+    /**
+     * @param {boolean} enabled (true/false).
+     */
+    setRemoteDebuggingEnabled(value) {}
     /**
      * @return {boolean}
      */
@@ -31,26 +39,31 @@ cr.define('settings', function() {
    * @implements {settings.BravePrivacyBrowserProxy}
    */
   class BravePrivacyBrowserProxyImpl {
-    /** @override */
+    /** @overrides */
     getWebRTCPolicy() {
       return cr.sendWithPromise('getWebRTCPolicy');
     }
 
-    /** @override */
     setWebRTCPolicy(policy) {
       chrome.send('setWebRTCPolicy', [policy]);
     }
 
-    /** @override */
     getP3AEnabled() {
       return cr.sendWithPromise('getP3AEnabled');
     }
 
-    /** @override */
     setP3AEnabled(value) {
       chrome.send('setP3AEnabled', [value])
     }
 
+    getRemoteDebuggingEnabled() {
+      return cr.sendWithPromise('getRemoteDebuggingEnabled');
+    }
+
+    setRemoteDebuggingEnabled(value) {
+      chrome.send('setRemoteDebuggingEnabled', [value])
+    }
+
     wasPushMessagingEnabledAtStartup() {
       return loadTimeData.getBoolean('pushMessagingEnabledAtStartup');
     }

browser/ui/webui/settings/brave_privacy_handler.cc

@@ -9,15 +9,16 @@
 
 #include "base/bind.h"
 #include "base/values.h"
+#include "brave/common/pref_names.h"
 #include "brave/components/p3a/pref_names.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "components/gcm_driver/gcm_buildflags.h"
 #include "components/prefs/pref_service.h"
 #include "content/public/browser/web_ui.h"
-#include "content/public/common/webrtc_ip_handling_policy.h"
 #include "content/public/browser/web_ui_data_source.h"
+#include "content/public/common/webrtc_ip_handling_policy.h"
 
 #if !BUILDFLAG(USE_GCM_FROM_PLATFORM)
 #include "brave/browser/gcm_driver/brave_gcm_channel_status.h"
@@ -40,6 +41,14 @@ void BravePrivacyHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "getP3AEnabled", base::BindRepeating(&BravePrivacyHandler::GetP3AEnabled,
                                            base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "setRemoteDebuggingEnabled",
+      base::BindRepeating(&BravePrivacyHandler::SetRemoteDebuggingEnabled,
+                          base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "getRemoteDebuggingEnabled",
+      base::BindRepeating(&BravePrivacyHandler::GetRemoteDebuggingEnabled,
+                          base::Unretained(this)));
 }
 
 // static
@@ -97,3 +106,25 @@ void BravePrivacyHandler::GetP3AEnabled(const base::ListValue* args) {
   AllowJavascript();
   ResolveJavascriptCallback(args->GetList()[0].Clone(), base::Value(enabled));
 }
+
+void BravePrivacyHandler::SetRemoteDebuggingEnabled(
+    const base::ListValue* args) {
+  CHECK_EQ(args->GetSize(), 1U);
+
+  bool enabled;
+  args->GetBoolean(0, &enabled);
+
+  PrefService* local_state = g_browser_process->local_state();
+  local_state->SetBoolean(kRemoteDebuggingEnabled, enabled);
+}
+
+void BravePrivacyHandler::GetRemoteDebuggingEnabled(
+    const base::ListValue* args) {
+  CHECK_EQ(args->GetSize(), 1U);
+
+  PrefService* local_state = g_browser_process->local_state();
+  bool enabled = local_state->GetBoolean(kRemoteDebuggingEnabled);
+
+  AllowJavascript();
+  ResolveJavascriptCallback(args->GetList()[0].Clone(), base::Value(enabled));
+}

browser/ui/webui/settings/brave_privacy_handler.h

@@ -33,6 +33,9 @@ class BravePrivacyHandler : public settings::SettingsPageUIHandler {
   void SetP3AEnabled(const base::ListValue* args);
   void GetP3AEnabled(const base::ListValue* args);
 
+  void SetRemoteDebuggingEnabled(const base::ListValue* args);
+  void GetRemoteDebuggingEnabled(const base::ListValue* args);
+
   Profile* profile_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(BravePrivacyHandler);

chromium_src/chrome/browser/devtools/devtools_ui_bindings.cc

@@ -0,0 +1,26 @@
+/* Copyright (c) 2019 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "brave/common/pref_names.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/devtools/devtools_ui_bindings.h"
+
+#define IsValidRemoteFrontendURL IsValidRemoteFrontendURL_ChromiumImpl
+#include "../../../../../../chrome/browser/devtools/devtools_ui_bindings.cc"
+#undef IsValidRemoteFrontendURL
+
+bool DevToolsUIBindings::IsValidRemoteFrontendURL(const GURL& url) {
+  PrefService* local_state = g_browser_process->local_state();
+  if (local_state) {
+    if (!local_state->GetBoolean(kRemoteDebuggingEnabled)) {
+      LOG(ERROR)
+          << "Remote debugging is DISABLED. If you want to use it, please "
+             "enable in brave://settings/privacy";
+      return false;
+    }
+  }
+
+  return IsValidRemoteFrontendURL_ChromiumImpl(url);
+}

chromium_src/chrome/browser/devtools/devtools_ui_bindings.h

@@ -0,0 +1,15 @@
+// Copyright (c) 2019 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// you can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef BRAVE_CHROMIUM_SRC_CHROME_BROWSER_DEVTOOLS_DEVTOOLS_UI_BINDINGS_H_
+#define BRAVE_CHROMIUM_SRC_CHROME_BROWSER_DEVTOOLS_DEVTOOLS_UI_BINDINGS_H_
+
+#define IsValidRemoteFrontendURL \
+    IsValidRemoteFrontendURL_ChromiumImpl(const GURL& url); \
+    static bool IsValidRemoteFrontendURL
+#include "../../../../../chrome/browser/devtools/devtools_ui_bindings.h"
+#undef IsValidRemoteFrontendURL
+
+#endif  // BRAVE_CHROMIUM_SRC_CHROME_BROWSER_DEVTOOLS_DEVTOOLS_UI_BINDINGS_H_

chromium_src/chrome/browser/ui/webui/settings/settings_localized_strings_provider.cc

@@ -162,7 +162,9 @@ void BraveAddCommonStrings(content::WebUIDataSource* html_source,
     {"p3aEnableTitle",
       IDS_BRAVE_P3A_ENABLE_SETTING},
     {"p3aEnabledDesc",
-      IDS_BRAVE_P3A_ENABLE_SETTING_SUBITEM}
+      IDS_BRAVE_P3A_ENABLE_SETTING_SUBITEM},
+    {"remoteDebuggingEnabledTitle",
+      IDS_SETTINGS_REMOTE_DEBUGGING_TITLE}
   };
   AddLocalizedStringsBulk(html_source, localized_strings,
                           base::size(localized_strings));

common/pref_names.cc

@@ -72,6 +72,7 @@ const char kBraveWalletEncryptedSeed[] = "brave.wallet.encrypted_seed";
 const char kBraveWalletEnabled[] = "brave.wallet.enabled";
 const char kAlwaysShowBookmarkBarOnNTP[] =
     "brave.always_show_bookmark_bar_on_ntp";
+const char kRemoteDebuggingEnabled[] = "brave.remote_debugging_enabled";
 
 #if defined(OS_ANDROID)
 const char kDesktopModeEnabled[] = "brave.desktop_mode_enabled";

common/pref_names.h

@@ -61,6 +61,7 @@ extern const char kBraveWalletAES256GCMSivNonce[];
 extern const char kBraveWalletEncryptedSeed[];
 extern const char kBraveWalletEnabled[];
 extern const char kAlwaysShowBookmarkBarOnNTP[];
+extern const char kRemoteDebuggingEnabled[];
 
 #if defined(OS_ANDROID)
 extern const char kDesktopModeEnabled[];