[Media Router] Add ProvideSinks() Mojo API

chrome/browser/media/router/mojo/media_router_mojo_metrics.h

 // Copyright 2016 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 CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_METRICS_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_METRICS_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/time/time.h"
 #include "chrome/browser/media/router/route_request_result.h"
@@ skipping 25 matching lines @@
   START_OBSERVING_MEDIA_ROUTES = 8,
   STOP_OBSERVING_MEDIA_ROUTES = 9,
   START_LISTENING_FOR_ROUTE_MESSAGES = 10,
   STOP_LISTENING_FOR_ROUTE_MESSAGES = 11,
   CONNECTION_ERROR = 12,
   REGISTER_MEDIA_ROUTE_PROVIDER = 13,
   CONNECT_ROUTE_BY_ROUTE_ID = 14,
   ENABLE_MDNS_DISCOVERY = 15,
   UPDATE_MEDIA_SINKS = 16,
   SEARCH_SINKS = 17,
+  ON_SINKS_DISCOVERED = 18,

[mark a. foltz, 2017/02/10 01:23:55]

I think you'll need to update tools/metrics/histograms/histograms.xml with this
new value.

[zhaobin, 2017/02/16 22:56:35]

Done.

 
   // NOTE: Add entries only immediately above this line.
-  TOTAL_COUNT = 18
+  TOTAL_COUNT = 19
 };
 
 // The install status of the Media Router component extension.
 enum class MediaRouteProviderVersion {
   // Installed but version is invalid or cannot be determined.
   UNKNOWN = 0,
   // Installed and the extension version matches the browser version.
   SAME_VERSION_AS_CHROME = 1,
   // Installed and the extension version is one version behind the browser
   // version.
@@ skipping 49 matching lines @@
 
   // Returns the version status of the Media Router component extension.
   static MediaRouteProviderVersion GetMediaRouteProviderVersion(
       const base::Version& extension_version,
       const base::Version& browser_version);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_METRICS_H_