Don't bundle the FakeMLManager class in regular builds

Given that this functionality is only used in the development viewer and in TESTING builds, there's no reason to include this in the regular builds.

web/genericcom.js

@@ -53,6 +53,12 @@ class ExternalServices extends BaseExternalServices {
 }
 
 class MLManager {
+  static {
+    if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
+      this.getFakeMLManager = options => new FakeMLManager(options);
+    }
+  }
+
   async isEnabledFor(_name) {
     return false;
   }
@@ -68,83 +74,82 @@ class MLManager {
   guess(_data) {}
 
   toggleService(_name, _enabled) {}
-
-  static getFakeMLManager(options) {
-    return new FakeMLManager(options);
-  }
 }
 
-class FakeMLManager {
-  eventBus = null;
-
-  hasProgress = false;
-
-  constructor({ enableGuessAltText, enableAltTextModelDownload }) {
-    this.enableGuessAltText = enableGuessAltText;
-    this.enableAltTextModelDownload = enableAltTextModelDownload;
-  }
-
-  setEventBus(eventBus, abortSignal) {
-    this.eventBus = eventBus;
-  }
-
-  async isEnabledFor(_name) {
-    return this.enableGuessAltText;
-  }
-
-  async deleteModel(_name) {
-    this.enableAltTextModelDownload = false;
-    return null;
-  }
-
-  async loadModel(_name) {}
-
-  async downloadModel(_name) {
-    // Simulate downloading the model but with progress.
-    // The progress can be seen in the new alt-text dialog.
-    this.hasProgress = true;
-
-    const { promise, resolve } = Promise.withResolvers();
-    const total = 1e8;
-    const end = 1.5 * total;
-    const increment = 5e6;
-    let loaded = 0;
-    const id = setInterval(() => {
-      loaded += increment;
-      if (loaded <= end) {
-        this.eventBus.dispatch("loadaiengineprogress", {
-          source: this,
-          detail: {
-            total,
-            totalLoaded: loaded,
-            finished: loaded + increment >= end,
-          },
-        });
-        return;
-      }
-      clearInterval(id);
-      this.hasProgress = false;
-      this.enableAltTextModelDownload = true;
-      resolve(true);
-    }, 900);
-    return promise;
-  }
-
-  isReady(_name) {
-    return this.enableAltTextModelDownload;
-  }
-
-  guess({ request: { data } }) {
-    return new Promise(resolve => {
-      setTimeout(() => {
-        resolve(data ? { output: "Fake alt text." } : { error: true });
-      }, 3000);
-    });
-  }
-
-  toggleService(_name, enabled) {
-    this.enableGuessAltText = enabled;
-  }
+if (typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) {
+  // eslint-disable-next-line no-var
+  var FakeMLManager = class {
+    eventBus = null;
+
+    hasProgress = false;
+
+    constructor({ enableGuessAltText, enableAltTextModelDownload }) {
+      this.enableGuessAltText = enableGuessAltText;
+      this.enableAltTextModelDownload = enableAltTextModelDownload;
+    }
+
+    setEventBus(eventBus, abortSignal) {
+      this.eventBus = eventBus;
+    }
+
+    async isEnabledFor(_name) {
+      return this.enableGuessAltText;
+    }
+
+    async deleteModel(_name) {
+      this.enableAltTextModelDownload = false;
+      return null;
+    }
+
+    async loadModel(_name) {}
+
+    async downloadModel(_name) {
+      // Simulate downloading the model but with progress.
+      // The progress can be seen in the new alt-text dialog.
+      this.hasProgress = true;
+
+      const { promise, resolve } = Promise.withResolvers();
+      const total = 1e8;
+      const end = 1.5 * total;
+      const increment = 5e6;
+      let loaded = 0;
+      const id = setInterval(() => {
+        loaded += increment;
+        if (loaded <= end) {
+          this.eventBus.dispatch("loadaiengineprogress", {
+            source: this,
+            detail: {
+              total,
+              totalLoaded: loaded,
+              finished: loaded + increment >= end,
+            },
+          });
+          return;
+        }
+        clearInterval(id);
+        this.hasProgress = false;
+        this.enableAltTextModelDownload = true;
+        resolve(true);
+      }, 900);
+      return promise;
+    }
+
+    isReady(_name) {
+      return this.enableAltTextModelDownload;
+    }
+
+    guess({ request: { data } }) {
+      return new Promise(resolve => {
+        setTimeout(() => {
+          resolve(data ? { output: "Fake alt text." } : { error: true });
+        }, 3000);
+      });
+    }
+
+    toggleService(_name, enabled) {
+      this.enableGuessAltText = enabled;
+    }
+  };
 }
 
 export { ExternalServices, initCom, MLManager, Preferences };