[Media Router] Add UMA histograms tracking component extension version/wakeups

chrome/browser/media/router/media_router_metrics.h

Index: chrome/browser/media/router/media_router_metrics.h
diff --git a/chrome/browser/media/router/media_router_metrics.h b/chrome/browser/media/router/media_router_metrics.h
index dbdeb1989ee74c1ff3e10d5c6a9631a4647dc8f3..9eda482a2852af5a9284def8f04ac3cc8a351e37 100644
--- a/chrome/browser/media/router/media_router_metrics.h
+++ b/chrome/browser/media/router/media_router_metrics.h
@@ -5,8 +5,19 @@
 #ifndef CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_METRICS_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MEDIA_ROUTER_METRICS_H_
 
+#include "base/gtest_prod_util.h"
 #include "base/time/time.h"
 
+namespace base {
+class Version;
+}  // namespace base
+
+#if !defined(OS_ANDROID)
+namespace extensions {
+class Extension;
+}  // namespace extensions
+#endif  // !defined(OS_ANDROID)
+
 namespace media_router {
 
 // NOTE: Do not renumber enums as that would confuse interpretation of
@@ -24,6 +35,30 @@ enum class MediaRouterDialogOpenOrigin {
   TOTAL_COUNT = 4
 };
 
+// The possible outcomes from a route creation response.
+enum class MediaRouterRouteCreationOutcome {
+  SUCCESS = 0,
+  FAILURE_NO_ROUTE = 1,
+  FAILURE_INVALID_SINK = 2,
+
+  // Note: Add entries only immediately above this line.
+  TOTAL_COUNT = 3,
+};
+
+// The possible actions a user can take while interacting with the Media Router
+// dialog.
+enum class MediaRouterUserAction {
+  CHANGE_MODE = 0,
+  START_LOCAL = 1,
+  STOP_LOCAL = 2,
+  CLOSE = 3,
+  STATUS_REMOTE = 4,
+
+  // Note: Add entries only immediately above this line.
+  TOTAL_COUNT = 5
+};
+
+#if !defined(OS_ANDROID)
 // Why the Media Route Provider process was woken up.
 enum class MediaRouteProviderWakeReason {
   CREATE_ROUTE = 0,
@@ -46,28 +81,31 @@ enum class MediaRouteProviderWakeReason {
   TOTAL_COUNT = 15
 };
 
-// The possible outcomes from a route creation response.
-enum class MediaRouterRouteCreationOutcome {
-  SUCCESS = 0,
-  FAILURE_NO_ROUTE = 1,
-  FAILURE_INVALID_SINK = 2,
-
+// 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.
+  ONE_VERSION_BEHIND_CHROME = 2,
+  // Installed and the extension version is more than one version behind the
+  // browser version.
+  MULTIPLE_VERSIONS_BEHIND_CHROME = 3,
   // Note: Add entries only immediately above this line.
-  TOTAL_COUNT = 3,
+  TOTAL_COUNT = 4
 };
 
-// The possible actions a user can take while interacting with the Media Router
-// dialog.
-enum class MediaRouterUserAction {
-  CHANGE_MODE = 0,
-  START_LOCAL = 1,
-  STOP_LOCAL = 2,
-  CLOSE = 3,
-  STATUS_REMOTE = 4,
-
+// The outcome of an attempt to wake the Media Router component event page.
+enum class MediaRouteProviderWakeup {
+  SUCCESS = 0,
+  ERROR_UNKNOWN = 1,
+  ERROR_TOO_MANY_RETRIES = 2,
   // Note: Add entries only immediately above this line.
-  TOTAL_COUNT = 5
+  TOTAL_COUNT = 3
 };
+#endif  // !defined(OS_ANDROID)
 
 class MediaRouterMetrics {
  public:
@@ -75,10 +113,6 @@ class MediaRouterMetrics {
   static void RecordMediaRouterDialogOrigin(
       MediaRouterDialogOpenOrigin origin);
 
-  // Records why the media route provider extension was woken up.
-  static void RecordMediaRouteProviderWakeReason(
-      MediaRouteProviderWakeReason reason);
-
   // Records the duration it takes for the Media Router dialog to open and
   // finish painting after a user clicks to open the dialog.
   static void RecordMediaRouterDialogPaint(
@@ -97,6 +131,29 @@ class MediaRouterMetrics {
   // Records the outcome in a create route response.
   static void RecordRouteCreationOutcome(
       MediaRouterRouteCreationOutcome outcome);
+
+#if !defined(OS_ANDROID)
+  // Records the installed version of the Media Router component extension.
+  static void RecordMediaRouteProviderVersion(
+      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);
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(MediaRouteProviderMetricsTest,
+                           TestGetMediaRouteProviderVersion);
+
+  // Returns the version status of the Media Router component extension.
+  static MediaRouteProviderVersion GetMediaRouteProviderVersion(
+      const base::Version& extension_version,
+      const base::Version& browser_version);
+#endif  // !defined(OS_ANDROID)
 };
 
 }  // namespace media_router