Convert RapporRecorder to use mojo.

chrome/common/render_messages.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.
 
 // Multiply-included file, no traditional include guard.
 #include <stdint.h>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 546 matching lines @@
                     blink::WebAppBannerPromptReply /* reply */,
                     std::string /* referrer */)
 
 // Tells the browser to restart the app banner display pipeline.
 IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_RequestShowAppBanner,
                     int32_t /* request_id */)
 
 // Sent by the renderer to indicate that a fields trial has been activated.
 IPC_MESSAGE_CONTROL1(ChromeViewHostMsg_FieldTrialActivated,
                      std::string /* name */)
-
-// Record a sample string to a Rappor metric.
-IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRappor,
-                     std::string /* metric */,
-                     std::string /* sample */)
-
-// Record a domain and registry of a url to a Rappor metric.
-IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRapporURL,
-                     std::string /* metric */,
-                     GURL /* sample url */)