Add UMA histograms for HtmlVideoElementCapturerSource

content/renderer/media/html_video_element_capturer_source.cc

 // Copyright 2015 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/renderer/media/html_video_element_capturer_source.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/renderer/media/media_stream_video_source.h"
+#include "content/renderer/media/webrtc_uma_histograms.h"
 #include "media/base/limits.h"
 #include "media/blink/webmediaplayer_impl.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayer.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/libyuv/include/libyuv.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 
 namespace {
 const float kMinFramesPerSecond = 1.0;
 }  // anonymous namespace
 
 namespace content {
 
 //static
 scoped_ptr<HtmlVideoElementCapturerSource>
 HtmlVideoElementCapturerSource::CreateFromWebMediaPlayerImpl(
     blink::WebMediaPlayer* player,
     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner) {
+  // Save histogram data so we can see how much HTML Video capture is used.
+  // The histogram counts the number of calls to the JS API.
+  UpdateWebRTCMethodCount(WEBKIT_VIDEO_CAPTURE_STREAM);
+
   return make_scoped_ptr(new HtmlVideoElementCapturerSource(
       static_cast<media::WebMediaPlayerImpl*>(player)->AsWeakPtr(),
       io_task_runner));
 }
 
 HtmlVideoElementCapturerSource::HtmlVideoElementCapturerSource(
     const base::WeakPtr<blink::WebMediaPlayer>& player,
     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
     : web_media_player_(player),
       io_task_runner_(io_task_runner),
@@ skipping 134 matching lines @@
       next_capture_time_ = current_time;
   }
   // Schedule next capture.
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE, base::Bind(&HtmlVideoElementCapturerSource::sendNewFrame,
                             weak_factory_.GetWeakPtr()),
       next_capture_time_ - current_time);
 }
 
 }  // namespace content