Revert "[Sanitizer] Implement config and defaultConfig as attributes."

This reverts commit e3d90a7.

Reason for revert: Consistent failures on multiple buildbots:
  crbug.com/1226882

Original change's description:
> [Sanitizer] Implement config and defaultConfig as attributes.
>
> This follows spec discussion at github.com/WICG/sanitizer-api/issues/92
>
> Bug: 1213893
> Change-Id: I9b7102fecd7f896b5cec160592a5d6bd60c16716
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2996826
> Commit-Queue: Daniel Vogelheim <vogelheim@chromium.org>
> Reviewed-by: Yifan Luo <lyf@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#898870}

Bug: 1213893
Change-Id: Icb5ca18bd24e97cd27b4a8f71f96c3994397785d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3010215
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Owners-Override: Nicolas Ouellet-Payeur <ouellet@google.com>
Cr-Commit-Position: refs/heads/master@{#898927}

third_party/blink/renderer/modules/sanitizer_api/sanitizer.idl

@@ -16,6 +16,6 @@ typedef (DOMString or TrustedHTML or DocumentFragment or Document) SanitizerInpu
   [MeasureAs=SanitizerAPIToFragment, CallWith=ScriptState, RaisesException] DocumentFragment sanitize(SanitizerInputWithTrustedHTML input);
   [MeasureAs=SanitizerAPIToString, CallWith=ScriptState, RaisesException] DOMString sanitizeToString(SanitizerInput input);
 
-  [MeasureAs=SanitizerAPIGetConfig] readonly attribute SanitizerConfig config;
-  [MeasureAs=SanitizerAPIGetDefaultConfig] static readonly attribute SanitizerConfig defaultConfig;
+  [MeasureAs=SanitizerAPIGetConfig] SanitizerConfig config();
+  [MeasureAs=SanitizerAPIGetDefaultConfig] static SanitizerConfig defaultConfig();
 };

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -8148,9 +8148,9 @@ interface SVGViewElement : SVGElement
     method constructor
     setter zoomAndPan
 interface Sanitizer
-    static getter defaultConfig
+    static method defaultConfig
     attribute @@toStringTag
-    getter config
+    method config
     method constructor
     method sanitize
     method sanitizeToString

third_party/blink/web_tests/wpt_internal/sanitizer-api/sanitizer-query-config.https.tenative.html

@@ -21,23 +21,23 @@
 
   test(t => {
     // Quick sanity test: Test a few default values.
-    assert_in_array("div", Sanitizer.defaultConfig.allowElements);
-    assert_false(Sanitizer.defaultConfig.allowElements.includes("script"));
-    assert_false(Sanitizer.defaultConfig.allowElements.includes("noscript"));
+    assert_in_array("div", Sanitizer.defaultConfig().allowElements);
+    assert_false(Sanitizer.defaultConfig().allowElements.includes("script"));
+    assert_false(Sanitizer.defaultConfig().allowElements.includes("noscript"));
 
-    assert_true("span" in Sanitizer.defaultConfig.allowAttributes);
-    assert_false("onclick" in Sanitizer.defaultConfig.allowAttributes);
+    assert_true("span" in Sanitizer.defaultConfig().allowAttributes);
+    assert_false("onclick" in Sanitizer.defaultConfig().allowAttributes);
 
-    assert_false("dropElements" in Sanitizer.defaultConfig);
-    assert_false("blockElements" in Sanitizer.defaultConfig);
-    assert_false("dropAttributes" in Sanitizer.defaultConfig);
-    assert_false(Sanitizer.defaultConfig.allowCustomElements);
-  }, "SanitizerAPI defaultConfig");
+    assert_false("dropElements" in Sanitizer.defaultConfig());
+    assert_false("blockElements" in Sanitizer.defaultConfig());
+    assert_false("dropAttributes" in Sanitizer.defaultConfig());
+    assert_false(Sanitizer.defaultConfig().allowCustomElements);
+  }, "SanitizerAPI defaultConfig()");
 
   test(t => {
-    assert_deep_equals(Sanitizer.defaultConfig,
-                       new Sanitizer().config);
-  }, "SanitizerAPI config on default created Sanitizer");
+    assert_deep_equals(Sanitizer.defaultConfig(),
+                       new Sanitizer().config());
+  }, "SanitizerAPI config() on default created Sanitizer");
 
   test(t => {
     const configs = [{
@@ -52,8 +52,8 @@
       allowCustomElements: false,
     }];
     for (const config of configs)
-      assert_deep_equals(config, new Sanitizer(config).config);
-  }, "SanitizerAPI config reflects creation config.");
+      assert_deep_equals(config, new Sanitizer(config).config());
+  }, "SanitizerAPI config() reflects creation config.");
 </script>
 </body>
 </html>