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

chrome/browser/ui/exclusive_access/exclusive_access_controller_base.h

 // Copyright (c) 2015 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_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_
 #define CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/ui/exclusive_access/exclusive_access_bubble_type.h"
@@ skipping 47 matching lines @@
   virtual void OnTabClosing(content::WebContents* web_contents);
 
   // Callbacks ////////////////////////////////////////////////////////////////
 
   // content::NotificationObserver to detect page navigation and exit exclusive
   // access.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
+  // For recording UMA.
+  // Called when the bubble UI is reshown after a timeout.
+  void BubbleReshown();
+  // For recording UMA. Called when the exclusive access session ends.
+  void Exiting();
+
  protected:
   void SetTabWithExclusiveAccess(content::WebContents* tab);
 
   ExclusiveAccessManager* exclusive_access_manager() const { return manager_; }
 
   // Exits exclusive access mode for the tab if currently exclusive.
   virtual void ExitExclusiveAccessIfNecessary() = 0;
 
   // Notifies the tab that it has been forced out of exclusive access mode
   // if necessary.
   virtual void NotifyTabExclusiveAccessLost() = 0;
 
+  // Prefix used in the name of histograms relating to this type of controller.
+  virtual const char* HistogramPrefix() = 0;
+
  private:
   void UpdateNotificationRegistrations();
 
   ExclusiveAccessManager* const manager_;
 
   content::NotificationRegistrar registrar_;
 
-  content::WebContents* tab_with_exclusive_access_;
+  content::WebContents* tab_with_exclusive_access_ = nullptr;
+
+  // The number of bubble re-shows for the current session (reset upon exiting).
+  int bubble_reshow_count_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(ExclusiveAccessControllerBase);
 };
 
 #endif  // CHROME_BROWSER_UI_EXCLUSIVE_ACCESS_EXCLUSIVE_ACCESS_CONTROLLER_BASE_H_