Move Google Cache copy suggestion to an action button in the neterror interstitial

chrome/common/localized_error.h

 // Copyright (c) 2011 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_COMMON_LOCALIZED_ERROR_H_
 #define CHROME_COMMON_LOCALIZED_ERROR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 46 matching lines @@
   // part of the app.
   static void GetAppErrorStrings(const GURL& display_url,
                                  const extensions::Extension* app,
                                  const std::string& locale,
                                  base::DictionaryValue* error_strings);
 #endif
 
   static const char kHttpErrorDomain[];
 
  private:
+  // Sets up the Google Cached Copy button experiment if part of the
+  // field trial. This promotes the Google cached copy suggestion from under
+  // the details section to a blue button.
+  static void EnableGoogleCachedCopyButtonExperiment(
+      base::ListValue* suggestions,
+      base::DictionaryValue* error_strings);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(LocalizedError);
 };
 
 #endif  // CHROME_COMMON_LOCALIZED_ERROR_H_