Added UMA stats for extensions events on addListener.

chrome/browser/extensions/api/management/management_api.cc

Index: chrome/browser/extensions/api/management/management_api.cc
diff --git a/chrome/browser/extensions/api/management/management_api.cc b/chrome/browser/extensions/api/management/management_api.cc
index b788c99ded8408de572297257cd2c38c947dec1b..0a479e014c4f8145573a35e5236d05c7bbdec1a4 100644
--- a/chrome/browser/extensions/api/management/management_api.cc
+++ b/chrome/browser/extensions/api/management/management_api.cc
@@ -57,7 +57,6 @@ namespace keys = extension_management_api_constants;
 
 namespace extensions {
 
-namespace events = event_names;
 namespace management = api::management;
 
 namespace {
@@ -649,16 +648,16 @@ void ManagementEventRouter::Observe(
 
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_INSTALLED:
-      event_name = events::kOnExtensionInstalled;
+      event_name = event_names::kOnExtensionInstalled;
       break;
     case chrome::NOTIFICATION_EXTENSION_UNINSTALLED:
-      event_name = events::kOnExtensionUninstalled;
+      event_name = event_names::kOnExtensionUninstalled;
       break;
     case chrome::NOTIFICATION_EXTENSION_LOADED:
-      event_name = events::kOnExtensionEnabled;
+      event_name = event_names::kOnExtensionEnabled;
       break;
     case chrome::NOTIFICATION_EXTENSION_UNLOADED:
-      event_name = events::kOnExtensionDisabled;
+      event_name = event_names::kOnExtensionDisabled;
       break;
     default:
       NOTREACHED();
@@ -666,12 +665,12 @@ void ManagementEventRouter::Observe(
   }
 
   scoped_ptr<ListValue> args(new ListValue());
-  if (event_name == events::kOnExtensionUninstalled) {
+  if (event_name == event_names::kOnExtensionUninstalled) {
     args->Append(Value::CreateStringValue(
         content::Details<const Extension>(details).ptr()->id()));
   } else {
     const Extension* extension = NULL;
-    if (event_name == events::kOnExtensionDisabled) {
+    if (event_name == event_names::kOnExtensionDisabled) {
       extension = content::Details<UnloadedExtensionInfo>(details)->extension;
     } else {
       extension = content::Details<const Extension>(details).ptr();
@@ -689,13 +688,13 @@ void ManagementEventRouter::Observe(
 ManagementAPI::ManagementAPI(Profile* profile)
     : profile_(profile) {
   ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-      this, events::kOnExtensionInstalled);
+      this, event_names::kOnExtensionInstalled);
   ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-      this, events::kOnExtensionUninstalled);
+      this, event_names::kOnExtensionUninstalled);
   ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-      this, events::kOnExtensionEnabled);
+      this, event_names::kOnExtensionEnabled);
   ExtensionSystem::Get(profile_)->event_router()->RegisterObserver(
-      this, events::kOnExtensionDisabled);
+      this, event_names::kOnExtensionDisabled);
 }
 
 ManagementAPI::~ManagementAPI() {