Added UMA collection for fullscreen / mouse lock bubble re-shows.

chrome/browser/ui/exclusive_access/fullscreen_controller.h

 // Copyright (c) 2012 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_EXCLUSIVE_ACCESS_FULLSCREEN_CONTROLLER_H_
 #define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_CONTROLLER_H_
 
 #include <set>
 
 #include "base/macros.h"
@@ skipping 141 matching lines @@
 
   // Posts a task to call NotifyFullscreenChange.
   void PostFullscreenChangeNotification(bool is_fullscreen);
   // Sends a NOTIFICATION_FULLSCREEN_CHANGED notification.
   void NotifyFullscreenChange(bool is_fullscreen);
 
   // Notifies the tab that it has been forced out of fullscreen mode if
   // necessary.
   void NotifyTabExclusiveAccessLost() override;
 
+  const char* HistogramPrefix() override;
+
   void ToggleFullscreenModeInternal(FullscreenInternalOption option);
   void EnterFullscreenModeInternal(FullscreenInternalOption option);
   void ExitFullscreenModeInternal();
   void SetFullscreenedTab(content::WebContents* tab, const GURL& origin);
 
   ContentSetting GetFullscreenSetting() const;
 
   void SetPrivilegedFullscreenForTesting(bool is_privileged);
   // Returns true if |web_contents| was toggled into/out of fullscreen mode as a
   // screen-captured tab. See 'FullscreenWithinTab Note'.
@@ skipping 39 matching lines @@
   // Used in testing to confirm proper behavior for specific, privileged
   // fullscreen cases.
   bool is_privileged_fullscreen_for_testing_;
 
   base::WeakPtrFactory<FullscreenController> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FullscreenController);
 };
 
 #endif  // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_FULLSCREEN_CONTROLLER_H_