Control permission bubbles with Finch flag

chrome/browser/ui/website_settings/permission_bubble_manager.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_
 #define CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 12 matching lines @@
 //
 // A PermissionBubbleManager is associated with a particular WebContents.
 // Requests attached to a particular WebContents' PBM must outlive it.
 //
 // The PermissionBubbleManager should be addressed on the UI thread.
 class PermissionBubbleManager
     : public content::WebContentsObserver,
       public content::WebContentsUserData<PermissionBubbleManager>,
       public PermissionBubbleView::Delegate {
  public:
-  // Return the flag-driven enabled state of permissions bubbles.
+  // Return the enabled state of permissions bubbles.
+  // Controlled by a flag and FieldTrial.
   static bool Enabled();
 
   ~PermissionBubbleManager() override;
 
   // Adds a new request to the permission bubble. Ownership of the request
   // remains with the caller. The caller must arrange for the request to
   // outlive the PermissionBubbleManager. If a bubble is visible when this
   // call is made, the request will be queued up and shown after the current
   // bubble closes. A request with message text identical to an outstanding
   // request will receive a RequestFinished call immediately and not be added.
@@ skipping 91 matching lines @@
   GURL request_url_;
   bool request_url_has_loaded_;
 
   std::vector<bool> accept_states_;
   bool customization_mode_;
 
   base::WeakPtrFactory<PermissionBubbleManager> weak_factory_;
 };
 
 #endif  // CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_BUBBLE_MANAGER_H_