Fix scroll restoration when exiting fullscreen mode.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index 5a55b72c971f4f6fde42b0698ba5bda60b6a9cff..156cad08999fe9b966d9433f94e4b7db9fcda094 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -404,7 +404,8 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
 
   // Invoked when the renderer process has toggled the tab into/out of
   // fullscreen mode.
-  virtual void DidToggleFullscreenModeForTab(bool entered_fullscreen) {}
+  virtual void DidToggleFullscreenModeForTab(bool entered_fullscreen,
+                                             bool will_cause_resize) {}
 
   // Invoked when an interstitial page is attached or detached.
   virtual void DidAttachInterstitialPage() {}