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

content/browser/screen_orientation/screen_orientation_provider_android.cc

 // Copyright 2014 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.
 
 #include "content/browser/screen_orientation/screen_orientation_provider_android.h"
 
 #include "content/browser/android/content_view_core_impl.h"
 #include "content/browser/screen_orientation/screen_orientation_dispatcher_host.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 185 matching lines @@
   case blink::WebScreenOrientationUndefined:
     NOTREACHED();
     return blink::WebScreenOrientationLockDefault;
   }
 
   NOTREACHED();
   return blink::WebScreenOrientationLockDefault;
 }
 
 // static
+void ScreenOrientationProviderAndroid::StartAccurateListening() {
+  Java_ScreenOrientationProvider_startAccurateListening(
+      base::android::AttachCurrentThread());
+}
+
+// static
+void ScreenOrientationProviderAndroid::StopAccurateListening() {
+  Java_ScreenOrientationProvider_stopAccurateListening(
+      base::android::AttachCurrentThread());
+}
+
+// static
 ScreenOrientationProvider* ScreenOrientationProvider::Create(
     ScreenOrientationDispatcherHost* dispatcher,
     WebContents* web_contents) {
   return new ScreenOrientationProviderAndroid(dispatcher, web_contents);
 }
 
 } // namespace content