Expose whether a frame is focused to the browser process

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index c1c053c9820b589c5e516491914feabeac7b1ce6..2571c92e7c950374784f7f012d45e9d3c9aaf8b8 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -133,6 +133,7 @@ class CONTENT_EXPORT RenderWidgetHostImpl
   void NotifyTextDirection() override;
   void Focus() override;
   void Blur() override;
+  bool IsFocused() const override;
   void SetActive(bool active) override;
   void CopyFromBackingStore(const gfx::Rect& src_rect,
                             const gfx::Size& accelerated_dst_size,
@@ -828,6 +829,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl
       base::Callback<void(const unsigned char*, size_t)> > PendingSnapshotMap;
   PendingSnapshotMap pending_browser_snapshots_;
 
+  bool is_focused_;
+
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);