Update VideoFramePump to pass un-changed frames to encoders.

remoting/host/host_mock_objects.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 "remoting/host/host_mock_objects.h"
 
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/single_thread_task_runner.h"
 #include "net/base/ip_endpoint.h"
 #include "remoting/base/auto_thread_task_runner.h"
 #include "remoting/codec/audio_encoder.h"
 #include "remoting/codec/video_encoder.h"
 #include "remoting/host/audio_capturer.h"
 #include "remoting/host/input_injector.h"
 #include "remoting/proto/event.pb.h"
+#include "remoting/proto/video.pb.h"
 #include "remoting/protocol/transport.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
+#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
 
 namespace remoting {
 
 MockDesktopEnvironment::MockDesktopEnvironment() {}
 
 MockDesktopEnvironment::~MockDesktopEnvironment() {}
 
 scoped_ptr<AudioCapturer> MockDesktopEnvironment::CreateAudioCapturer() {
   return make_scoped_ptr(CreateAudioCapturerPtr());
 }
@@ skipping 53 matching lines @@
 MockHostStatusObserver::~MockHostStatusObserver() {}
 
 MockGnubbyAuthHandler::MockGnubbyAuthHandler() {}
 
 MockGnubbyAuthHandler::~MockGnubbyAuthHandler() {}
 
 MockMouseCursorMonitor::MockMouseCursorMonitor() {}
 
 MockMouseCursorMonitor::~MockMouseCursorMonitor() {}
 
+MockVideoEncoder::MockVideoEncoder() {
+}
+
+MockVideoEncoder::~MockVideoEncoder() {
+}
+
+scoped_ptr<VideoPacket> MockVideoEncoder::Encode(
+    const webrtc::DesktopFrame& frame) {
+  return make_scoped_ptr(EncodePtr(frame));
+}
+
 }  // namespace remoting