[Session restore] Add MRU logic to loading of background pages.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index d5ed42f6d334f41ecffa91cfae4295cad4a7a23f..643e993b2b5d7fdfd88d0eacb78fc29f3454127b 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -351,9 +351,12 @@ class WebContents : public PageNavigator,
   // change.
   virtual void NotifyNavigationStateChanged(InvalidateTypes changed_flags) = 0;
 
-  // Get the last time that the WebContents was made active (either when it was
-  // created or shown with WasShown()).
+  // Get/Set the last time that the WebContent was made active (either when it
+  // was created or shown with WasShown()). If the tab has been restored from a

[jam, 2015/05/18 15:31:37]

undo this comment change. content doesn't know about session restore, as that's
a chrome feature

[Georges Khalil, 2015/05/19 19:32:16]

Done.

+  // previous session, this will return the last time it was made active in the
+  // previous session instead of the tab creation time.
   virtual base::Time GetLastActiveTime() const = 0;
+  virtual void SetLastActiveTime(base::Time last_active_time) = 0;
 
   // Invoked when the WebContents becomes shown/hidden.
   virtual void WasShown() = 0;