[ScreenOrientation] Merge mojo interface ScreenOrientationListener into ScreenOrientation

content/browser/screen_orientation/screen_orientation_provider.h

Index: content/browser/screen_orientation/screen_orientation_provider.h
diff --git a/content/browser/screen_orientation/screen_orientation_provider.h b/content/browser/screen_orientation/screen_orientation_provider.h
index 0898070e3bb9471d3fee37c606deb4faf5e85720..c180fe517c607ee789e79211bdd2f57cae9bc0f5 100644
--- a/content/browser/screen_orientation/screen_orientation_provider.h
+++ b/content/browser/screen_orientation/screen_orientation_provider.h
@@ -35,6 +35,8 @@ class CONTENT_EXPORT ScreenOrientationProvider
   void LockOrientation(blink::WebScreenOrientationLockType orientation,
                        const LockOrientationCallback& callback) override;
   void UnlockOrientation() override;
+  void StartAccurateListen() override;
+  void StopAccurateListen() override;
 
   // Inform about a screen orientation update. It is called to let the provider
   // know if a lock has been resolved.
@@ -66,6 +68,10 @@ class CONTENT_EXPORT ScreenOrientationProvider
   // Not owned, responsible for platform implementations.
   static ScreenOrientationDelegate* delegate_;
 
+#if defined(OS_ANDROID)
+  int accurate_listen_count_ = 0;

[mlamouri (slow - plz ping), 2017/02/15 10:58:41]

nit: `accurate_listener_count_`? feel free to ignore

[leonhsl(Using Gerrit), 2017/02/16 05:00:05]

Done.

+#endif
+
   // Whether the ScreenOrientationProvider currently has a lock applied.
   bool lock_applied_;