<webview>: Correctly shift focus between WebContents.

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 c4486f4ebc8c80c4b379e4bc381c32006211bf14..3a54b29ec74e7828dadae733f5ab6f61cc9bfcb4 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -243,6 +243,11 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
   // but it failed, thus HasFocus() returns false.
   bool is_focused() const { return is_focused_; }
 
+  // Support for focus tracking on multi-WebContents cases. This will notify all
+  // renderers involved in a page about a page-level focus update. Users other
+  // than WebContents and RenderWidgetHost should use Focus()/Blur().
+  void SetPageFocus(bool focused);
+
   // Called to notify the RenderWidget that it has lost the mouse lock.
   void LostMouseLock();