Late initialize MediaController, for less resource i.e. ProcessThread, usage by PeerConnection.

webrtc/api/statscollector_unittest.cc

Index: webrtc/api/statscollector_unittest.cc
diff --git a/webrtc/api/statscollector_unittest.cc b/webrtc/api/statscollector_unittest.cc
index d4a59a1a6d5f360f32dc0a4606477dc8d4a2ce92..2c815b6c7c845758c735270312bc912e1015e6f4 100644
--- a/webrtc/api/statscollector_unittest.cc
+++ b/webrtc/api/statscollector_unittest.cc
@@ -66,9 +66,8 @@ const uint32_t kSsrcOfTrack = 1234;
 
 class MockWebRtcSession : public webrtc::WebRtcSession {
  public:
-  explicit MockWebRtcSession(webrtc::MediaControllerInterface* media_controller)
-      : WebRtcSession(media_controller,
-                      rtc::Thread::Current(),
+  explicit MockWebRtcSession()
+      : WebRtcSession(rtc::Thread::Current(),
                       rtc::Thread::Current(),
                       nullptr) {}
   MOCK_METHOD0(voice_channel, cricket::VoiceChannel*());
@@ -486,13 +485,7 @@ class StatsCollectorTest : public testing::Test {
  protected:
   StatsCollectorTest()
       : media_engine_(new cricket::FakeMediaEngine()),
-        channel_manager_(
-            new cricket::ChannelManager(media_engine_, rtc::Thread::Current())),
-        media_controller_(
-            webrtc::MediaControllerInterface::Create(cricket::MediaConfig(),
-                                                     rtc::Thread::Current(),
-                                                     channel_manager_.get())),
-        session_(media_controller_.get()) {
+        session_() {
     // By default, we ignore session GetStats calls.
     EXPECT_CALL(session_, GetTransportStats(_)).WillRepeatedly(Return(false));
     // Add default returns for mock classes.
@@ -747,8 +740,6 @@ class StatsCollectorTest : public testing::Test {
   }
 
   cricket::FakeMediaEngine* media_engine_;
-  rtc::scoped_ptr<cricket::ChannelManager> channel_manager_;
-  rtc::scoped_ptr<webrtc::MediaControllerInterface> media_controller_;
   MockWebRtcSession session_;
   MockPeerConnection pc_;
   FakeDataChannelProvider data_channel_provider_;