[TabManager] Start function refactoring.

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 225 matching lines @@
   // for more details.
   base::TimeTicks NowTicks() const;
 
   // Dispatches a memory pressure message to a single child process, and
   // schedules another call to itself as long as memory pressure continues.
   void DoChildProcessDispatch();
 
   // Implementation of DiscardTab.
   bool DiscardTabImpl();
 
+  // Returns true if tabs can be discarded only once.
+  bool ShouldOnlyDiscardOnce();

[Georges Khalil, 2016/05/17 15:18:01]

nit: Finally, I think CanOnlyDiscardOnce makes more sense as the name. It
matches the description as well.

[Anderson Silva, 2016/05/17 15:34:07]

Acknowledged.

+
   // Timer to periodically update the stats of the renderers.
   base::RepeatingTimer update_timer_;
 
   // Timer to periodically report whether a tab has been discarded since the
   // last time the timer has fired.
   base::RepeatingTimer recent_tab_discard_timer_;
 
   // A listener to global memory pressure events.
   std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 
@@ skipping 70 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_