Add WebrtcVideoEncoder interface

remoting/protocol/video_frame_pump_unittest.cc

Index: remoting/protocol/video_frame_pump_unittest.cc
diff --git a/remoting/protocol/video_frame_pump_unittest.cc b/remoting/protocol/video_frame_pump_unittest.cc
index 1cbdc3184f15125a6769e966dfe20e5cb439a2fe..19eea7ba8f61e1af0541f0e3aa9809ba9df6c3b4 100644
--- a/remoting/protocol/video_frame_pump_unittest.cc
+++ b/remoting/protocol/video_frame_pump_unittest.cc
@@ -62,8 +62,7 @@ class MockVideoEncoder : public VideoEncoder {
   MOCK_METHOD1(SetLosslessColor, void(bool));
   MOCK_METHOD1(EncodePtr, VideoPacket*(const webrtc::DesktopFrame&));
 
-  std::unique_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame,
-                                      uint32_t flags) {
+  std::unique_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) {
     return base::WrapUnique(EncodePtr(frame));
   }
 };
@@ -83,8 +82,8 @@ class ThreadCheckVideoEncoder : public VideoEncoderVerbatim {
     EXPECT_TRUE(task_runner_->BelongsToCurrentThread());
   }
 
-  std::unique_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame,
-                                      uint32_t flags) override {
+  std::unique_ptr<VideoPacket> Encode(
+      const webrtc::DesktopFrame& frame) override {
     return base::MakeUnique<VideoPacket>();
   }