Add UMA histograms for more detailed latency tracking on the CRD host.

remoting/codec/video_encoder_helper.cc

 // Copyright 2014 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_helper.h"
 
 #include "remoting/proto/video.pb.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
@@ skipping 39 matching lines @@
     for (webrtc::DesktopRegion::Iterator r(*frame.shape());
          !r.IsAtEnd(); r.Advance()) {
       Rect* rect = packet->add_desktop_shape_rects();
       rect->set_x(r.rect().left());
       rect->set_y(r.rect().top());
       rect->set_width(r.rect().width());
       rect->set_height(r.rect().height());
     }
   }
 
-  // Store the capture time and frame DPI.
-  packet->set_capture_time_ms(frame.capture_time_ms());
+  // Store frame DPI.
   if (!frame.dpi().is_zero()) {
     packet->mutable_format()->set_x_dpi(frame.dpi().x());
     packet->mutable_format()->set_y_dpi(frame.dpi().y());
   }
 
   return packet.Pass();
 }
 
 }  // namespace remoting