Switch base::Value typemapping to be by value instead of by unique_ptr.

content/browser/renderer_host/media/video_capture_controller.cc

 // 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.
 
 #include "content/browser/renderer_host/media/video_capture_controller.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 432 matching lines @@
   if (!has_received_frames_) {
     UMA_HISTOGRAM_COUNTS("Media.VideoCapture.Width",
                          frame_info->coded_size.width());
     UMA_HISTOGRAM_COUNTS("Media.VideoCapture.Height",
                          frame_info->coded_size.height());
     UMA_HISTOGRAM_ASPECT_RATIO("Media.VideoCapture.AspectRatio",
                                frame_info->coded_size.width(),
                                frame_info->coded_size.height());
     double frame_rate = 0.0f;
     media::VideoFrameMetadata metadata;
-    metadata.MergeInternalValuesFrom(*frame_info->metadata);
+    metadata.MergeInternalValuesFrom(frame_info->metadata);
     if (!metadata.GetDouble(VideoFrameMetadata::FRAME_RATE, &frame_rate)) {
       frame_rate = video_capture_format_.frame_rate;
     }
     UMA_HISTOGRAM_COUNTS("Media.VideoCapture.FrameRate", frame_rate);
     has_received_frames_ = true;
   }
 }
 
 void VideoCaptureController::OnBufferRetired(int buffer_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
@@ skipping 158 matching lines @@
     EventHandlerAction action) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   for (const auto& client : controller_clients_) {
     if (client->session_closed)
       continue;
     action.Run(client->event_handler, client->controller_id);
   }
 }
 
 }  // namespace content