Remove debug instrumentation for crbug.com/359406.

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 186 matching lines @@
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_WebUIJavaScript,
                     base::string16  /* javascript */)
 #endif
 
 // Set the content setting rules stored by the renderer.
 IPC_MESSAGE_CONTROL1(ChromeViewMsg_SetContentSettingRules,
                      RendererContentSettingRules /* rules */)
 
 // Tells the renderer to create a FieldTrial, and by using a 100% probability
 // for the FieldTrial, forces the FieldTrial to have assigned group name.
-IPC_MESSAGE_CONTROL4(ChromeViewMsg_SetFieldTrialGroup,
+IPC_MESSAGE_CONTROL2(ChromeViewMsg_SetFieldTrialGroup,
                      std::string /* field trial name */,
-                     std::string /* group name that was assigned. */,
-                     base::ProcessId /* for debugging, the sender process id */,
-                     int32_t /* for debugging, the debug token */)
+                     std::string /* group name that was assigned. */)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetPageSequenceNumber,
                     int /* page_seq_no */)
 
 IPC_MESSAGE_ROUTED0(ChromeViewMsg_DetermineIfPageSupportsInstant)
 
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SearchBoxSetDisplayInstantResults,
                     bool /* display_instant_results */)
 
 IPC_MESSAGE_ROUTED2(ChromeViewMsg_SearchBoxFocusChanged,
@@ skipping 347 matching lines @@
 
 // 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 */)