Convert SetContentSettingRules to use mojo, part 1/2.

chrome/browser/content_settings/tab_specific_content_settings.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/browser/content_settings/tab_specific_content_settings.h"
 
 #include <list>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 755 matching lines @@
       ContentSetting setting = map->GetContentSetting(media_origin,
                                                       media_origin,
                                                       content_type,
                                                       std::string());
       ContentSettingsStatus& status = content_settings_status_[content_type];
       status.allowed = setting == CONTENT_SETTING_ALLOW;
       status.blocked = setting == CONTENT_SETTING_BLOCK;
     }
     RendererContentSettingRules rules;
     GetRendererContentSettingRules(map, &rules);
+    // TODO(nigeltao): use Mojo instead of legacy IPC.
     Send(new ChromeViewMsg_SetContentSettingRules(rules));
   }
 }
 
 void TabSpecificContentSettings::RenderFrameForInterstitialPageCreated(
     content::RenderFrameHost* render_frame_host) {
   // We want to tell the renderer-side code to ignore content settings for this
   // page.
   render_frame_host->Send(new ChromeViewMsg_SetAsInterstitial(
       render_frame_host->GetRoutingID()));
@@ skipping 124 matching lines @@
       static_cast<MicrophoneCameraStateFlags>(
           TabSpecificContentSettings::MICROPHONE_ACCESSED |
           TabSpecificContentSettings::MICROPHONE_BLOCKED |
           TabSpecificContentSettings::CAMERA_ACCESSED |
           TabSpecificContentSettings::CAMERA_BLOCKED);
   OnMediaStreamPermissionSet(
       web_contents()->GetLastCommittedURL(),
       media_blocked,
       std::string(), std::string(), std::string(), std::string());
 }