Supply empty frames until codec is done with top-off.

remoting/codec/video_encoder_vpx_unittest.cc

 // Copyright 2013 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/codec/video_encoder_vpx.h"
 
 #include <limits>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 144 matching lines @@
 
   scoped_ptr<VideoEncoderVpx> encoder(VideoEncoderVpx::CreateForVP8());
 
   scoped_ptr<webrtc::DesktopFrame> frame(CreateTestFrame(frame_size));
   frame->set_dpi(webrtc::DesktopVector(96, 97));
   scoped_ptr<VideoPacket> packet = encoder->Encode(*frame);
   EXPECT_EQ(packet->format().x_dpi(), 96);
   EXPECT_EQ(packet->format().y_dpi(), 97);
 }
 
-TEST(VideoEncoderVerbatimTest, Vp8EncodeUnchangedFrame) {
+TEST(VideoEncoderVpxTest, Vp8EncodeUnchangedFrame) {
   scoped_ptr<VideoEncoderVpx> encoder(VideoEncoderVpx::CreateForVP8());
   TestVideoEncoderEmptyFrames(encoder.get(), 0);
 }
 
-TEST(VideoEncoderVerbatimTest, Vp9LosslessUnchangedFrame) {
+TEST(VideoEncoderVpxTest, Vp9LosslessUnchangedFrame) {
   scoped_ptr<VideoEncoderVpx> encoder(VideoEncoderVpx::CreateForVP9());
   encoder->SetLosslessEncode(true);
   TestVideoEncoderEmptyFrames(encoder.get(), 0);
 }
 
-TEST(VideoEncoderVerbatimTest, Vp9LossyUnchangedFrame) {
+TEST(VideoEncoderVpxTest, Vp9LossyUnchangedFrame) {
   scoped_ptr<VideoEncoderVpx> encoder(VideoEncoderVpx::CreateForVP9());
   encoder->SetLosslessEncode(false);
-  TestVideoEncoderEmptyFrames(encoder.get(), 2);
+  // Expect that VP9+CR should generate no more than 10 top-off frames
+  // per cycle, and take no more than 2 cycles to top-off.
+  TestVideoEncoderEmptyFrames(encoder.get(), 20);
 }
 
 }  // namespace remoting