<webview>: Correctly shift focus between WebContents.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 232 matching lines @@
 
   // Indicates whether the RenderWidgetHost thinks it is focused.
   // This is different from RenderWidgetHostView::HasFocus() in the sense that
   // it reflects what the renderer process knows: it saves the state that is
   // sent/received.
   // RenderWidgetHostView::HasFocus() is checking whether the view is focused so
   // it is possible in some edge cases that a view was requested to be focused
   // 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();
 
   // Notifies the RenderWidget that it lost the mouse lock.
   void SendMouseLockLost();
 
   // Noifies the RenderWidget of the current mouse cursor visibility state.
   void SendCursorVisibilityState(bool is_visible);
 
   // Notifies the RenderWidgetHost that the View was destroyed.
@@ skipping 599 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_