Move creation of PeerConnection from the RenderView to the RenderThreadImpl.

content/renderer/media/webrtc_uma_histograms.h

+// 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.
+
+#ifndef CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_
+#define CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_
+
+#include "base/metrics/histogram.h"
+
+namespace {
+
+// Helper enum used for histogramming calls to WebRTC APIs from JavaScript.
+enum JavaScriptAPIName {
+  WEBKIT_GET_USER_MEDIA,
+  WEBKIT_PEER_CONNECTION,
+  INVALID_NAME
+};
+
+// Helper method used to collect information about the number of times
+// different WebRTC API:s are called from JavaScript.
+// The histogram can be viewed at chrome://histograms/WebRTC.webkitApiCount.
+void UpdateWebRTCMethodCount(JavaScriptAPIName api_name) {
+  UMA_HISTOGRAM_ENUMERATION("WebRTC.webkitApiCount", api_name, INVALID_NAME);
+}
+
+} //  namespace
+
+#endif  // CONTENT_RENDERER_MEDIA_WEBRTC_UMA_HISTOGRAMS_H_