Discardable property support on TabManager

chrome/browser/memory/tab_manager.h

Index: chrome/browser/memory/tab_manager.h
diff --git a/chrome/browser/memory/tab_manager.h b/chrome/browser/memory/tab_manager.h
index cd5c3480417bf76976c8a3849ae4d0e5fe6c5057..ac138320fdfc325b3bcc58ab8c1bd6cc853d55c1 100644
--- a/chrome/browser/memory/tab_manager.h
+++ b/chrome/browser/memory/tab_manager.h
@@ -128,6 +128,12 @@ class TabManager : public TabStripModelObserver {
   void AddObserver(TabManagerObserver* observer);
   void RemoveObserver(TabManagerObserver* observer);
 
+  // Sets/clears the discardable state of the tab.
+  void SetDiscardableState(content::WebContents* contents, bool state);

[Georges Khalil, 2016/07/21 21:21:41]

nit: SetTabDiscardableState (for consistency).

[Anderson Silva, 2016/07/21 22:16:45]

Done.

+
+  // Returns true if the tab is discardable by auto discarding feature.
+  bool IsDiscardable(content::WebContents* contents);

[Georges Khalil, 2016/07/21 21:21:41]

ditto. Also, this can be const and put it before the Set (same change in cc).

[Anderson Silva, 2016/07/21 22:16:45]

Done.

+
  private:
   FRIEND_TEST_ALL_PREFIXES(TabManagerTest, CanOnlyDiscardOnce);
   FRIEND_TEST_ALL_PREFIXES(TabManagerTest, ChildProcessNotifications);
@@ -151,6 +157,11 @@ class TabManager : public TabStripModelObserver {
   void OnDiscardedStateChange(content::WebContents* contents,
                               bool is_discarded);
 
+  // Called by WebContentsData whenever the discardable state of a WebContents
+  // changes, so that observers can be informed.
+  void OnDiscardableStateChange(content::WebContents* contents,
+                                bool is_discardable);
+
   // The time that a renderer is given to react to a memory pressure
   // notification before another renderer is also notified. This prevents all
   // renderers from receiving and acting upon notifications simultaneously,