Add MemoryCoordinatorDelegate

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 <memory>
@@ skipping 129 matching lines @@
   // Returns the auto-discardable state of the tab. When true, the tab is
   // eligible to be automatically discarded when critical memory pressure hits,
   // otherwise the tab is ignored and will never be automatically discarded.
   // Note that this property doesn't block the discarding of the tab via other
   // methods (about:discards for instance).
   bool IsTabAutoDiscardable(content::WebContents* contents) const;
 
   // Sets/clears the auto-discardable state of the tab.
   void SetTabAutoDiscardableState(content::WebContents* contents, bool state);
 
+  // Returns true when a given renderer can suspend when it is backgrounded.
+  bool CanSuspendBackgroundedRenderer(int render_process_id);
+
   // Returns true if |first| is considered less desirable to be killed than
   // |second|.
   static bool CompareTabStats(const TabStats& first, const TabStats& second);
 
   // Returns a unique ID for a WebContents. Do not cast back to a pointer, as
   // the WebContents could be deleted if the user closed the tab.
   static int64_t IdFromWebContents(content::WebContents* web_contents);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(TabManagerTest, AutoDiscardable);
@@ skipping 219 matching lines @@
 
   // Weak pointer factory used for posting delayed tasks to task_runner_.
   base::WeakPtrFactory<TabManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabManager);
 };
 
 }  // namespace memory
 
 #endif  // CHROME_BROWSER_MEMORY_TAB_MANAGER_H_