Add a menu item to content_shell to open devtools to make it more discoverable.

content/shell/shell_browser_context.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_BROWSER_CONTEXT_H_
 #define CONTENT_SHELL_SHELL_BROWSER_CONTEXT_H_
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_temp_dir.h"
 #include "content/public/browser/browser_context.h"
 
 namespace content {
 
 class DownloadManagerDelegate;
 class ResourceContext;
-class ShellBrowserMainParts;
 class ShellDownloadManagerDelegate;
 
 class ShellBrowserContext : public BrowserContext {
  public:
   explicit ShellBrowserContext(bool off_the_record);
   virtual ~ShellBrowserContext();
 
   // BrowserContext implementation.
   virtual FilePath GetPath() OVERRIDE;
   virtual bool IsOffTheRecord() const OVERRIDE;
@@ skipping 21 matching lines @@
   scoped_ptr<ResourceContext> resource_context_;
   scoped_refptr<ShellDownloadManagerDelegate> download_manager_delegate_;
   scoped_refptr<net::URLRequestContextGetter> url_request_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellBrowserContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_BROWSER_CONTEXT_H_