Prevent memory leak for ChromeContentBrowserClient.

content/common/content_client.h

 // Copyright (c) 2011 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_COMMON_CONTENT_CLIENT_H_
 #define CONTENT_COMMON_CONTENT_CLIENT_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "base/scoped_ptr.h"
 #include "content/browser/content_browser_client.h"
 
 class GURL;
 struct GPUInfo;
 
 namespace content {
 
 class ContentClient;
 // Setter and getter for the client.  The client should be set early, before any
 // content code is called.
 void SetContentClient(ContentClient* client);
 ContentClient* GetContentClient();
 
 // Interface that the embedder implements.
 class ContentClient {
  public:
   ContentClient();
 
   // Gets or sets the embedder API for participating in browser logic.
   // The client must be set early, before any content code is called.
   ContentBrowserClient* browser_client() {
-    return browser_client_;
+    return browser_client_.get();
   }
   void set_browser_client(ContentBrowserClient* client) {
-    browser_client_ = client;
+    browser_client_.reset(client);
   }
 
   // Sets the URL that is logged if the child process crashes. Use GURL() to
   // clear the URL.
   virtual void SetActiveURL(const GURL& url) {}
 
   // Sets the data on the gpu to send along with crash reports.
   virtual void SetGpuInfo(const GPUInfo& gpu_info) {}
 
  private:
-  ContentBrowserClient* browser_client_;
+  scoped_ptr<ContentBrowserClient> browser_client_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CONTENT_CLIENT_H_