Mac content shell: File > New makes a new browser window.

content/shell/shell_content_browser_client.cc

 // 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.
 
 #include "content/shell/shell_content_browser_client.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "content/shell/shell.h"
+#include "content/shell/shell_browser_context.h"
 #include "content/shell/shell_browser_main_parts.h"
 #include "content/shell/shell_devtools_delegate.h"
 #include "content/shell/shell_render_view_host_observer.h"
 #include "content/shell/shell_switches.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 
 ShellContentBrowserClient::ShellContentBrowserClient()
@@ skipping 321 matching lines @@
 #endif
 
 #if defined(USE_NSS)
 crypto::CryptoModuleBlockingPasswordDelegate*
     ShellContentBrowserClient::GetCryptoPasswordDelegate(const GURL& url) {
   return NULL;
 }
 #endif
 
 ShellBrowserContext* ShellContentBrowserClient::browser_context() {
-  return shell_browser_main_parts_->browser_context();
+  return ShellBrowserContext::GetInstance();
 }
 
 }  // namespace content