<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 eb69fce58933f696fe3b2e2f7293b19d713581e4..2d39c14c1e87c6c4a9544085758a2b3263223875 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -250,6 +250,10 @@ 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. Users other than

[alexmos, 2016/10/31 18:57:57]

Let's explain more carefully what this does.  I.e., sends the page focus update
IPC to all renderers involved in rendering the current page.

[avallee, 2016/11/07 19:18:44]

Done.

+  // WebContens and RenderWidgetHost should use Focus()/Blur().
+  void SetPageFocus(bool focused);
+
   // Called to notify the RenderWidget that it has lost the mouse lock.
   void LostMouseLock();