DevTools: request page thumbnails from the devtools handler delegate, do not redirect to chrome://t…

content/shell/shell_devtools_delegate.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_DEVTOOLS_DELEGATE_H_
 #define CONTENT_SHELL_SHELL_DEVTOOLS_DELEGATE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 13 matching lines @@
   ShellDevToolsDelegate(int port, net::URLRequestContextGetter* context_getter);
   virtual ~ShellDevToolsDelegate();
 
   // Stops http server.
   void Stop();
 
   // DevToolsHttpProtocolHandler::Delegate overrides.
   virtual std::string GetDiscoveryPageHTML() OVERRIDE;
   virtual bool BundlesFrontendResources() OVERRIDE;
   virtual std::string GetFrontendResourcesBaseURL() OVERRIDE;
+  virtual std::string GetPageThumbnailData(const GURL& url) OVERRIDE;
 
   DevToolsHttpHandler* devtools_http_handler() {
     return devtools_http_handler_;
   }
 
  private:
   net::URLRequestContextGetter* context_getter_;
   DevToolsHttpHandler* devtools_http_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDevToolsDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_DEVTOOLS_DELEGATE_H_