[Merge M49] [TabManager] Protect tabs that are using camera/microphone.

chrome/browser/memory/tab_manager.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_MEMORY_TAB_MANAGER_H_
 #define CHROME_BROWSER_MEMORY_TAB_MANAGER_H_
 
 #include <stdint.h>
 
 #include <utility>
@@ skipping 149 matching lines @@
   // TabStripModelObserver overrides.
   void TabChangedAt(content::WebContents* contents,
                     int index,
                     TabChangeType change_type) override;
   void ActiveTabChanged(content::WebContents* old_contents,
                         content::WebContents* new_contents,
                         int index,
                         int reason) override;
 
   // Returns true if the tab is currently playing audio or has played audio
-  // recently.
-  bool IsAudioTab(content::WebContents* contents) const;
+  // recently, or if the tab is currently accessing the camera, microphone or
+  // mirroring the display.
+  bool IsMediaTab(content::WebContents* contents) const;
 
   // Returns the WebContentsData associated with |contents|. Also takes care of
   // creating one if needed.
   WebContentsData* GetWebContentsData(content::WebContents* contents) const;
 
   // Returns true if |first| is considered less desirable to be killed than
   // |second|.
   static bool CompareTabStats(TabStats first, TabStats second);
 
   // Returns either the system's clock or the test clock. See |test_tick_clock_|
@@ skipping 44 matching lines @@
   // Pointer to a test clock. If this is set, NowTicks() returns the value of
   // this test clock. Otherwise it returns the system clock's value.
   base::TickClock* test_tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(TabManager);
 };
 
 }  // namespace memory
 
 #endif  // CHROME_BROWSER_MEMORY_TAB_MANAGER_H_