Mojo-ify implementation of screen orientation locking/unlocking.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 3afb1aab039d99d206c9b33af0d666dbd9d6c669..bfd4cb197fb75b8a188ba8d607c1fcbf8fed95c3 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -73,7 +73,7 @@ class RenderViewHostDelegateView;
 class RenderWidgetHostImpl;
 class RenderWidgetHostInputEventRouter;
 class SavePackage;
-class ScreenOrientationDispatcherHost;
+class ScreenOrientationImpl;
 class SiteInstance;
 class TestWebContents;
 class TextInputManager;
@@ -209,10 +209,6 @@ class CONTENT_EXPORT WebContentsImpl
 
   WebContentsView* GetView() const;
 
-  ScreenOrientationDispatcherHost* screen_orientation_dispatcher_host() {
-    return screen_orientation_dispatcher_host_.get();
-  }
-
   bool should_normally_be_visible() { return should_normally_be_visible_; }
 
   // Indicate if the window has been occluded, and pass this to the views, only
@@ -488,6 +484,7 @@ class CONTENT_EXPORT WebContentsImpl
       int browser_plugin_instance_id) override;
   device::GeolocationServiceContext* GetGeolocationServiceContext() override;
   device::WakeLockServiceContext* GetWakeLockServiceContext() override;
+  ScreenOrientationImpl* GetScreenOrientation() override;
   void EnterFullscreenMode(const GURL& origin) override;
   void ExitFullscreenMode(bool will_cause_resize) override;
   bool ShouldRouteMessageEvent(
@@ -1378,8 +1375,7 @@ class CONTENT_EXPORT WebContentsImpl
 
   std::unique_ptr<device::WakeLockServiceContext> wake_lock_service_context_;
 
-  std::unique_ptr<ScreenOrientationDispatcherHost>
-      screen_orientation_dispatcher_host_;
+  std::unique_ptr<ScreenOrientationImpl> screen_orientation_;
 
   std::unique_ptr<ManifestManagerHost> manifest_manager_host_;