Convert ChromeViewMsg_SetFieldTrialGroup to use mojo.

chrome/renderer/chrome_render_thread_observer.cc

 // 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.
 
 #include "chrome/renderer/chrome_render_thread_observer.h"
 
 #include <stddef.h>
 
 #include <limits>
 #include <memory>
@@ skipping 270 matching lines @@
       &ChromeRenderThreadObserver::OnRendererConfigurationAssociatedRequest,
       base::Unretained(this)));
 }
 
 void ChromeRenderThreadObserver::UnregisterMojoInterfaces(
     content::AssociatedInterfaceRegistry* associated_interfaces) {
   associated_interfaces->RemoveInterface(
       chrome::mojom::RendererConfiguration::Name_);
 }
 
-bool ChromeRenderThreadObserver::OnControlMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(ChromeRenderThreadObserver, message)
-    IPC_MESSAGE_HANDLER(ChromeViewMsg_SetFieldTrialGroup, OnSetFieldTrialGroup)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
 void ChromeRenderThreadObserver::OnRenderProcessShutdown() {
   visited_link_slave_.reset();
 
   // Workaround for http://crbug.com/672646
   renderer_configuration_bindings_.CloseAllBindings();
 }
 
 void ChromeRenderThreadObserver::OnFieldTrialGroupFinalized(
     const std::string& trial_name,
     const std::string& group_name) {
   chrome::mojom::FieldTrialRecorderPtr field_trial_recorder;
   content::RenderThread::Get()->GetRemoteInterfaces()->GetInterface(
       &field_trial_recorder);
   field_trial_recorder->FieldTrialActivated(trial_name);
 }
 
 void ChromeRenderThreadObserver::SetInitialConfiguration(
     bool is_incognito_process) {
   is_incognito_process_ = is_incognito_process;
 }
 
 void ChromeRenderThreadObserver::SetContentSettingRules(
     const RendererContentSettingRules& rules) {
   content_setting_rules_ = rules;
 }
 
+void ChromeRenderThreadObserver::SetFieldTrialGroup(
+    const std::string& trial_name,
+    const std::string& group_name) {
+  field_trial_syncer_.OnSetFieldTrialGroup(trial_name, group_name);
+}
+
 void ChromeRenderThreadObserver::OnRendererConfigurationAssociatedRequest(
     chrome::mojom::RendererConfigurationAssociatedRequest request) {
   renderer_configuration_bindings_.AddBinding(this, std::move(request));
 }
 
-void ChromeRenderThreadObserver::OnSetFieldTrialGroup(
-    const std::string& trial_name,
-    const std::string& group_name) {
-  field_trial_syncer_.OnSetFieldTrialGroup(trial_name, group_name);
-}
-
 const RendererContentSettingRules*
 ChromeRenderThreadObserver::content_setting_rules() const {
   return &content_setting_rules_;
 }