[Media Router] Adds return value to mojo MediaRouteProvider::TerminateRoute.

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"
 
 namespace base {
 class Version;
 }  // namespace base
 
 namespace extensions {
 class Extension;
 }  // namespace extensions
 
 namespace media_router {
 
 // NOTE: Do not renumber enums as that would confuse interpretation of
-// previously logged data. When making changes, also update the enum list
+// previously logged data. When making changes, also update the enum lists
 // in tools/metrics/histograms/histograms.xml to keep it in sync.
 
 // Why the Media Route Provider process was woken up.
 enum class MediaRouteProviderWakeReason {
   CREATE_ROUTE = 0,
   JOIN_ROUTE = 1,
   TERMINATE_ROUTE = 2,
   SEND_SESSION_MESSAGE = 3,
   SEND_SESSION_BINARY_MESSAGE = 4,
   DETACH_ROUTE = 5,
@@ skipping 46 matching lines @@
       const extensions::Extension& extension);
 
   // Records why the media route provider extension was woken up.
   static void RecordMediaRouteProviderWakeReason(
       MediaRouteProviderWakeReason reason);
 
   // Records the outcome of an attempt to wake the Media Router component event
   // page.
   static void RecordMediaRouteProviderWakeup(MediaRouteProviderWakeup wakeup);
 
+  // Records the outcome of a call to terminateRoute() on the Media Route
+  // Provider Manager.
+  static void RecordMediaRouteProviderTerminateRoute(
+      RouteRequestResult::ResultCode result_code);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaRouterMojoMetricsTest,
                            TestGetMediaRouteProviderVersion);
 
   // 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_