Poll for Display rotation on Android 4.0 and 4.1 when needed.

content/browser/screen_orientation/screen_orientation_provider_android.h

Index: content/browser/screen_orientation/screen_orientation_provider_android.h
diff --git a/content/browser/screen_orientation/screen_orientation_provider_android.h b/content/browser/screen_orientation/screen_orientation_provider_android.h
index eac7cce8537cbfcce32f44deb17a3c67c5e8a2a1..9b88386afab1e611732ff026c2fd3a44117d9751 100644
--- a/content/browser/screen_orientation/screen_orientation_provider_android.h
+++ b/content/browser/screen_orientation/screen_orientation_provider_android.h
@@ -33,6 +33,16 @@ class ScreenOrientationProviderAndroid : public ScreenOrientationProvider,
   // WebContentsObserver
   virtual void DidToggleFullscreenModeForTab(bool entered_fullscreen) OVERRIDE;
 
+  // Ask the ScreenOrientationListener (Java) to start accurately listening to
+  // the screen orientation. It keep track of the number of start request if it
+  // is already running an accurate listening.
+  static void StartAccurateListening();
+
+  // Ask the ScreenOrientationListener (Java) to stop accurately listening to
+  // the screen orientation. It will actually stop only if the number of stop
+  // requests matches the number of start requests.
+  static void StopAccurateListening();
+
  private:
   WebContentsImpl* web_contents_impl();