Added UMA stats for extensions events on addListener.

chrome/browser/extensions/browser_event_router.cc

Index: chrome/browser/extensions/browser_event_router.cc
diff --git a/chrome/browser/extensions/browser_event_router.cc b/chrome/browser/extensions/browser_event_router.cc
index 7b701f2ef50a5f6a44134a713bc1021fcc6302fb..99965aef355d05ca6424e622dbc9beaacf6d00eb 100644
--- a/chrome/browser/extensions/browser_event_router.cc
+++ b/chrome/browser/extensions/browser_event_router.cc
@@ -28,7 +28,6 @@
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents.h"
 
-namespace events = extensions::event_names;
 namespace tab_keys = extensions::tabs_constants;
 namespace page_actions_keys = extension_page_actions_api_constants;
 
@@ -170,7 +169,7 @@ void BrowserEventRouter::TabCreatedAt(WebContents* contents,
                                       bool active) {
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
   scoped_ptr<ListValue> args(new ListValue());
-  scoped_ptr<Event> event(new Event(events::kOnTabCreated, args.Pass()));
+  scoped_ptr<Event> event(new Event(event_names::kOnTabCreated, args.Pass()));
   event->restrict_to_profile = profile;
   event->user_gesture = EventRouter::USER_GESTURE_NOT_ENABLED;
   event->will_dispatch_callback =
@@ -203,7 +202,7 @@ void BrowserEventRouter::TabInsertedAt(WebContents* contents,
   args->Append(object_args);
 
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
-  DispatchEvent(profile, events::kOnTabAttached, args.Pass(),
+  DispatchEvent(profile, event_names::kOnTabAttached, args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);
 }
 
@@ -224,7 +223,7 @@ void BrowserEventRouter::TabDetachedAt(WebContents* contents, int index) {
   args->Append(object_args);
 
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
-  DispatchEvent(profile, events::kOnTabDetached, args.Pass(),
+  DispatchEvent(profile, event_names::kOnTabDetached, args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);
 }
 
@@ -244,7 +243,7 @@ void BrowserEventRouter::TabClosingAt(TabStripModel* tab_strip_model,
   args->Append(object_args);
 
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
-  DispatchEvent(profile, events::kOnTabRemoved, args.Pass(),
+  DispatchEvent(profile, event_names::kOnTabRemoved, args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);
 
   int removed_count = tab_entries_.erase(tab_id);
@@ -272,15 +271,15 @@ void BrowserEventRouter::ActiveTabChanged(WebContents* old_contents,
       Profile::FromBrowserContext(new_contents->GetBrowserContext());
   EventRouter::UserGestureState gesture = user_gesture ?
       EventRouter::USER_GESTURE_ENABLED : EventRouter::USER_GESTURE_NOT_ENABLED;
-  DispatchEvent(profile, events::kOnTabSelectionChanged,
+  DispatchEvent(profile, event_names::kOnTabSelectionChanged,
                 scoped_ptr<ListValue>(args->DeepCopy()), gesture);
-  DispatchEvent(profile, events::kOnTabActiveChanged,
+  DispatchEvent(profile, event_names::kOnTabActiveChanged,
                 scoped_ptr<ListValue>(args->DeepCopy()), gesture);
 
   // The onActivated event takes one argument: {windowId, tabId}.
   args->Remove(0, NULL);
   object_args->Set(tab_keys::kTabIdKey, Value::CreateIntegerValue(tab_id));
-  DispatchEvent(profile, events::kOnTabActivated, args.Pass(), gesture);
+  DispatchEvent(profile, event_names::kOnTabActivated, args.Pass(), gesture);
 }
 
 void BrowserEventRouter::TabSelectionChanged(
@@ -310,10 +309,10 @@ void BrowserEventRouter::TabSelectionChanged(
 
   // The onHighlighted event replaced onHighlightChanged.
   Profile* profile = tab_strip_model->profile();
-  DispatchEvent(profile, events::kOnTabHighlightChanged,
+  DispatchEvent(profile, event_names::kOnTabHighlightChanged,
                 scoped_ptr<ListValue>(args->DeepCopy()),
                 EventRouter::USER_GESTURE_UNKNOWN);
-  DispatchEvent(profile, events::kOnTabHighlighted, args.Pass(),
+  DispatchEvent(profile, event_names::kOnTabHighlighted, args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);
 }
 
@@ -333,7 +332,7 @@ void BrowserEventRouter::TabMoved(WebContents* contents,
   args->Append(object_args);
 
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
-  DispatchEvent(profile, events::kOnTabMoved, args.Pass(),
+  DispatchEvent(profile, event_names::kOnTabMoved, args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);
 }
 
@@ -435,7 +434,8 @@ void BrowserEventRouter::DispatchTabUpdatedEvent(
   // WillDispatchTabUpdatedEvent.
   Profile* profile = Profile::FromBrowserContext(contents->GetBrowserContext());
 
-  scoped_ptr<Event> event(new Event(events::kOnTabUpdated, args_base.Pass()));
+  scoped_ptr<Event> event(
+      new Event(event_names::kOnTabUpdated, args_base.Pass()));
   event->restrict_to_profile = profile;
   event->user_gesture = EventRouter::USER_GESTURE_NOT_ENABLED;
   event->will_dispatch_callback =
@@ -491,7 +491,7 @@ void BrowserEventRouter::TabReplacedAt(TabStripModel* tab_strip_model,
   args->Append(Value::CreateIntegerValue(old_tab_id));
 
   DispatchEvent(Profile::FromBrowserContext(new_contents->GetBrowserContext()),
-                events::kOnTabReplaced,
+                event_names::kOnTabReplaced,
                 args.Pass(),
                 EventRouter::USER_GESTURE_UNKNOWN);