[content shell] add support for running headless on mac

content/shell/shell.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_SHELL_SHELL_H_
 #define CONTENT_SHELL_SHELL_H_
 
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 33 matching lines @@
 class ShellDevToolsFrontend;
 class ShellJavaScriptDialogManager;
 class SiteInstance;
 class WebContents;
 
 // This represents one window of the Content Shell, i.e. all the UI including
 // buttons and url bar, as well as the web content area.
 class Shell : public WebContentsDelegate,
               public NotificationObserver {
  public:
+  static const int kDefaultTestWindowWidthDip;
+  static const int kDefaultTestWindowHeightDip;
+
   virtual ~Shell();
 
   void LoadURL(const GURL& url);
   void LoadURLForFrame(const GURL& url, const std::string& frame_name);
   void GoBackOrForward(int offset);
   void Reload();
   void Stop();
   void UpdateNavigationControls();
   void Close();
   void ShowDevTools();
@@ skipping 205 matching lines @@
   static base::Callback<void(Shell*)> shell_created_callback_;
 
   // True if the destructur of Shell should post a quit closure on the current
   // message loop if the destructed Shell object was the last one.
   static bool quit_message_loop_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_H_