Converted VideoFrameCapturer callbacks into a VideoFrameCapturer::Delegate interface.

remoting/host/host_mock_objects.cc

Index: remoting/host/host_mock_objects.cc
diff --git a/remoting/host/host_mock_objects.cc b/remoting/host/host_mock_objects.cc
index 3f5cfee9e1497ba0b9232ff9a80b875cb0d43f65..bb648f29f0248f87820576ab71bc3a6cf8e1530f 100644
--- a/remoting/host/host_mock_objects.cc
+++ b/remoting/host/host_mock_objects.cc
@@ -17,15 +17,6 @@ MockVideoFrameCapturer::MockVideoFrameCapturer() {}
 
 MockVideoFrameCapturer::~MockVideoFrameCapturer() {}
 
-MockCaptureCompletedCallback::MockCaptureCompletedCallback() {}
-
-MockCaptureCompletedCallback::~MockCaptureCompletedCallback() {}
-
-void MockCaptureCompletedCallback::CaptureCompleted(
-    scoped_refptr<CaptureData> capture_data) {
-  CaptureCompletedPtr(capture_data.get());
-}
-
 MockDesktopEnvironmentFactory::MockDesktopEnvironmentFactory()
     : DesktopEnvironmentFactory(NULL, NULL) {
 }