[chromecast] Start deprecating MediaMessageLoop.

chromecast/browser/media/cast_browser_cdm_factory.cc

 // Copyright 2014 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 "chromecast/browser/media/cast_browser_cdm_factory.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
-#include "chromecast/media/base/media_message_loop.h"
 #include "chromecast/media/cdm/browser_cdm_cast.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/cdm_config.h"
 #include "media/base/cdm_key_information.h"
 
 namespace chromecast {
 namespace media {
 
+CastBrowserCdmFactory::CastBrowserCdmFactory(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner)
+    : task_runner_(task_runner) {
+  DCHECK(task_runner_);
+}
+CastBrowserCdmFactory::~CastBrowserCdmFactory() {}
+
 void CastBrowserCdmFactory::Create(
     const std::string& key_system,
     const GURL& security_origin,
     const ::media::CdmConfig& cdm_config,
     const ::media::SessionMessageCB& session_message_cb,
     const ::media::SessionClosedCB& session_closed_cb,
     const ::media::LegacySessionErrorCB& legacy_session_error_cb,
     const ::media::SessionKeysChangeCB& session_keys_change_cb,
     const ::media::SessionExpirationUpdateCB& session_expiration_update_cb,
     const ::media::CdmCreatedCB& cdm_created_cb) {
@@ skipping 12 matching lines @@
   } else {
     browser_cdm = CreatePlatformBrowserCdm(cast_key_system);
   }
 
   if (!browser_cdm) {
     LOG(INFO) << "No matching key system found: " << cast_key_system;
     bound_cdm_created_cb.Run(nullptr, "No matching key system found.");
     return;
   }
 
-  MediaMessageLoop::GetTaskRunner()->PostTask(
+  task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&BrowserCdmCast::Initialize,
                  base::Unretained(browser_cdm.get()),
                  ::media::BindToCurrentLoop(session_message_cb),
                  ::media::BindToCurrentLoop(session_closed_cb),
                  ::media::BindToCurrentLoop(legacy_session_error_cb),
                  ::media::BindToCurrentLoop(session_keys_change_cb),
                  ::media::BindToCurrentLoop(session_expiration_update_cb)));
 
-  bound_cdm_created_cb.Run(
-      new BrowserCdmCastUi(browser_cdm, MediaMessageLoop::GetTaskRunner()), "");
+  bound_cdm_created_cb.Run(new BrowserCdmCastUi(browser_cdm, task_runner_), "");
 }
 
 scoped_refptr<BrowserCdmCast> CastBrowserCdmFactory::CreatePlatformBrowserCdm(
     const CastKeySystem& cast_key_system) {
   return nullptr;
 }
 
 }  // namespace media
 }  // namespace chromecast