Reland of OOPIF: Route keyboard events to focused frame in the browser process.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index bb8ad6bf8df017393e6e407911197527c9d0a5b5..5d12edfb43e46c9f46bbb75f3df7d4c803cbbf56 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -99,6 +99,12 @@
   // current FrameTree, not including the main frame's SiteInstance.
   virtual void ReplicatePageFocus(bool is_focused) {}
 
+  // Get the RenderWidgetHost of the currently focused frame.  With
+  // out-of-process iframes, multiple RenderWidgetHosts may be involved in
+  // rendering a page, and this function determines which RenderWidgetHost
+  // should consume a keyboard input event.
+  virtual RenderWidgetHostImpl* GetFocusedRenderWidgetHost();
+
 #if defined(OS_WIN)
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif