Add WebContentObserver::OnWebContentsLostFocus()

content/browser/renderer_host/render_widget_host_owner_delegate.h

 // Copyright 2015 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_OWNER_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_OWNER_DELEGATE_H_
 
 #include "content/common/content_export.h"
 
 namespace IPC {
@@ skipping 23 matching lines @@
 
   // The RenderWidgetHost has been initialized.
   virtual void RenderWidgetDidInit() = 0;
 
   // The RenderWidgetHost will be setting its loading state.
   virtual void RenderWidgetWillSetIsLoading(bool is_loading) = 0;
 
   // The RenderWidgetHost got the focus.
   virtual void RenderWidgetGotFocus() = 0;
 
+  // The RenderWidgetHost lost the focus.
+  virtual void RenderWidgetLostFocus() = 0;
+
   // The RenderWidgetHost forwarded a mouse event.
   virtual void RenderWidgetDidForwardMouseEvent(
       const blink::WebMouseEvent& mouse_event) = 0;
 
   // The RenderWidgetHost wants to forward a keyboard event; returns whether
   // it's allowed to do so.
   virtual bool MayRenderWidgetForwardKeyboardEvent(
       const NativeWebKeyboardEvent& key_event) = 0;
 
  protected:
   virtual ~RenderWidgetHostOwnerDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_OWNER_DELEGATE_H_