Revert of Use microsecond timestamp in cricket::VideoFrame.

webrtc/media/engine/webrtcvideoframefactory_unittest.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 11 matching lines @@
   WebRtcVideoFrameFactoryTest() {}
 
   void InitFrame(webrtc::VideoRotation frame_rotation) {
     const int frame_width = 1920;
     const int frame_height = 1080;
 
     // Build the CapturedFrame.
     captured_frame_.fourcc = cricket::FOURCC_I420;
     captured_frame_.pixel_width = 1;
     captured_frame_.pixel_height = 1;
-    captured_frame_.time_stamp = rtc::TimeNanos();
+    captured_frame_.time_stamp = 5678;
     captured_frame_.rotation = frame_rotation;
     captured_frame_.width = frame_width;
     captured_frame_.height = frame_height;
     captured_frame_.data_size =
         (frame_width * frame_height) +
         ((frame_width + 1) / 2) * ((frame_height + 1) / 2) * 2;
     captured_frame_buffer_.reset(new uint8_t[captured_frame_.data_size]);
     // Initialize memory to satisfy DrMemory tests.
     memset(captured_frame_buffer_.get(), 0, captured_frame_.data_size);
     captured_frame_.data = captured_frame_buffer_.get();
@@ skipping 57 matching lines @@
   cricket::WebRtcVideoFrameFactory factory_;
 };
 
 TEST_F(WebRtcVideoFrameFactoryTest, NoApplyRotation) {
   TestCreateAliasedFrame(false);
 }
 
 TEST_F(WebRtcVideoFrameFactoryTest, ApplyRotation) {
   TestCreateAliasedFrame(true);
 }