Update VideoFramePump to pass un-changed frames to encoders.

remoting/host/host_mock_objects.h

 // 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.
 
 #ifndef REMOTING_HOST_HOST_MOCK_OBJECTS_H_
 #define REMOTING_HOST_HOST_MOCK_OBJECTS_H_
 
 #include <string>
 
 #include "net/base/ip_endpoint.h"
+#include "remoting/codec/video_encoder.h"
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/client_session.h"
 #include "remoting/host/client_session_control.h"
 #include "remoting/host/desktop_environment.h"
 #include "remoting/host/gnubby_auth_handler.h"
 #include "remoting/host/host_status_observer.h"
 #include "remoting/host/input_injector.h"
 #include "remoting/host/screen_controls.h"
 #include "remoting/host/screen_resolution.h"
 #include "remoting/proto/control.pb.h"
@@ skipping 136 matching lines @@
   MockMouseCursorMonitor();
   ~MockMouseCursorMonitor() override;
 
   MOCK_METHOD2(Init, void(Callback* callback, Mode mode));
   MOCK_METHOD0(Capture, void());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockMouseCursorMonitor);
 };
 
+class MockVideoEncoder : public VideoEncoder {
+ public:
+  MockVideoEncoder();
+  ~MockVideoEncoder() override;
+
+  MOCK_METHOD1(SetLosslessEncode, void(bool));
+  MOCK_METHOD1(SetLosslessColor, void(bool));
+  MOCK_METHOD1(EncodePtr, VideoPacket*(const webrtc::DesktopFrame&));
+
+  scoped_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) override;
+};
+
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HOST_MOCK_OBJECTS_H_