Use scoped_ptr for ShellWindowLinkDelegate to prevent memory leak.

chrome/browser/ui/apps/chrome_shell_window_delegate.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 CHROME_BROWSER_UI_APPS_CHROME_SHELL_WINDOW_DELEGATE_H_
 #define CHROME_BROWSER_UI_APPS_CHROME_SHELL_WINDOW_DELEGATE_H_
 
 #include "apps/shell_window.h"
+#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/rect.h"
 
 namespace chrome {
 
+class ShellWindowLinkDelegate : public content::WebContentsDelegate {
+ public:
+  ShellWindowLinkDelegate();
+  virtual ~ShellWindowLinkDelegate();
+
+ private:
+  virtual content::WebContents* OpenURLFromTab(
+      content::WebContents* source,
+      const content::OpenURLParams& params) OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(ShellWindowLinkDelegate);
+};
+
 class ChromeShellWindowDelegate : public apps::ShellWindow::Delegate {
  public:
   ChromeShellWindowDelegate();
   virtual ~ChromeShellWindowDelegate();
 
   static void DisableExternalOpenForTesting();
 
  private:
   // apps::ShellWindow::Delegate:
   virtual void InitWebContents(content::WebContents* web_contents) OVERRIDE;
@@ skipping 17 matching lines @@
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension) OVERRIDE;
   virtual int PreferredIconSize() OVERRIDE;
   virtual void SetWebContentsBlocked(content::WebContents* web_contents,
                                      bool blocked) OVERRIDE;
   virtual bool IsWebContentsVisible(
       content::WebContents* web_contents) OVERRIDE;
 
+  scoped_ptr<ShellWindowLinkDelegate> shell_window_link_delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeShellWindowDelegate);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_APPS_CHROME_SHELL_WINDOW_DELEGATE_H_