Require WebLocalFrame to be created with a non-null client

components/plugins/renderer/webview_plugin.h

 // Copyright 2013 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 COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_
 #define COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 136 matching lines @@
   Delegate* delegate_;
 
   blink::WebCursorInfo current_cursor_;
 
   // Owns us.
   blink::WebPluginContainer* container_;
 
   // Owned by us, deleted via |close()|.
   blink::WebView* web_view_;
 
-  // Owned by us, deleted via |close()|.
-  blink::WebFrameWidget* web_frame_widget_;
-
-  // Owned by us, deleted via |close()|.
-  blink::WebFrame* web_frame_;
   gfx::Rect rect_;
 
   blink::WebString old_title_;
   bool focused_;
   bool is_painting_;
   bool is_resizing_;
 
   // A helper needed to create a WebLocalFrame.
   class PluginWebFrameClient : public blink::WebFrameClient {
    public:
     PluginWebFrameClient(WebViewPlugin* plugin) : plugin_(plugin) {}
     ~PluginWebFrameClient() override {}
     void didClearWindowObject(blink::WebLocalFrame* frame) override;
 
    private:
     WebViewPlugin* plugin_;
   };
   PluginWebFrameClient web_frame_client_;
 
   // Should be invalidated when destroy() is called.
   base::WeakPtrFactory<WebViewPlugin> weak_factory_;
 };
 
 #endif  // COMPONENTS_PLUGINS_RENDERER_WEBVIEW_PLUGIN_H_