<webview>: Correctly shift focus between WebContents.

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 60e1a9321972cb7f4cffffd168903a00b8481746..f653cde28de33ed4ce6505165d0446cd15f40a97 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -643,6 +643,9 @@ class CONTENT_EXPORT WebContentsImpl
   void ReplicatePageFocus(bool is_focused) override;
   RenderWidgetHostImpl* GetFocusedRenderWidgetHost(
       RenderWidgetHostImpl* receiving_widget) override;
+  RenderWidgetHostImpl* GetRenderWidgetHostWithPageFocus() override;
+  void EnsureOwningContentsIsFocused(
+      RenderWidgetHostImpl* render_widget_host) override;
   void RendererUnresponsive(RenderWidgetHostImpl* render_widget_host,
                             RendererUnresponsiveType type) override;
   void RendererResponsive(RenderWidgetHostImpl* render_widget_host) override;
@@ -1006,6 +1009,13 @@ class CONTENT_EXPORT WebContentsImpl
   // Returns the root of the WebContents tree.
   WebContentsImpl* GetOutermostWebContents();
 
+  // Become the focused WebContentsImpl. This will activate this content's main
+  // frame RenderWidget and indirectly all its subframe widgets.
+  // GetFocusedRenderWidgetHost will search this WebContentsImpl for a focused
+  // RenderWidgetHost. The previously focused WebContentsImpl, if any, will have
+  // its RenderWidgetHosts deactivated.
+  void SetAsFocusedWebContentsIfNecessary();
+
   // Navigation helpers --------------------------------------------------------
   //
   // These functions are helpers for Navigate() and DidNavigate().