Added UMA stats for extensions events on addListener.

chrome/browser/extensions/api/omnibox/omnibox_api.cc

Index: chrome/browser/extensions/api/omnibox/omnibox_api.cc
diff --git a/chrome/browser/extensions/api/omnibox/omnibox_api.cc b/chrome/browser/extensions/api/omnibox/omnibox_api.cc
index 55a6ee7689c27e467c7926fe35aebedbc8e0d050..024063d9ea10689988b530ece18e958aec06dc65 100644
--- a/chrome/browser/extensions/api/omnibox/omnibox_api.cc
+++ b/chrome/browser/extensions/api/omnibox/omnibox_api.cc
@@ -28,12 +28,12 @@
 #include "content/public/browser/notification_service.h"
 #include "ui/gfx/image/image.h"
 
-namespace events {
+namespace event_names {
 const char kOnInputStarted[] = "omnibox.onInputStarted";
 const char kOnInputChanged[] = "omnibox.onInputChanged";
 const char kOnInputEntered[] = "omnibox.onInputEntered";
 const char kOnInputCancelled[] = "omnibox.onInputCancelled";
-}  // namespace events
+}  // namespace event_names
 
 namespace extensions {
 
@@ -64,7 +64,7 @@ static const int kOmniboxIconPaddingRight = 0;
 void ExtensionOmniboxEventRouter::OnInputStarted(
     Profile* profile, const std::string& extension_id) {
   scoped_ptr<Event> event(new Event(
-      events::kOnInputStarted, make_scoped_ptr(new ListValue())));
+      event_names::kOnInputStarted, make_scoped_ptr(new ListValue())));
   event->restrict_to_profile = profile;
   ExtensionSystem::Get(profile)->event_router()->
       DispatchEventToExtension(extension_id, event.Pass());
@@ -75,14 +75,14 @@ bool ExtensionOmniboxEventRouter::OnInputChanged(
     Profile* profile, const std::string& extension_id,
     const std::string& input, int suggest_id) {
   if (!extensions::ExtensionSystem::Get(profile)->event_router()->
-          ExtensionHasEventListener(extension_id, events::kOnInputChanged))
+          ExtensionHasEventListener(extension_id, event_names::kOnInputChanged))
     return false;
 
   scoped_ptr<ListValue> args(new ListValue());
   args->Set(0, Value::CreateStringValue(input));
   args->Set(1, Value::CreateIntegerValue(suggest_id));
 
-  scoped_ptr<Event> event(new Event(events::kOnInputChanged, args.Pass()));
+  scoped_ptr<Event> event(new Event(event_names::kOnInputChanged, args.Pass()));
   event->restrict_to_profile = profile;
   ExtensionSystem::Get(profile)->event_router()->
       DispatchEventToExtension(extension_id, event.Pass());
@@ -107,7 +107,7 @@ void ExtensionOmniboxEventRouter::OnInputEntered(
   scoped_ptr<ListValue> args(new ListValue());
   args->Set(0, Value::CreateStringValue(input));
 
-  scoped_ptr<Event> event(new Event(events::kOnInputEntered, args.Pass()));
+  scoped_ptr<Event> event(new Event(event_names::kOnInputEntered, args.Pass()));
   event->restrict_to_profile = profile;
   ExtensionSystem::Get(profile)->event_router()->
       DispatchEventToExtension(extension_id, event.Pass());
@@ -122,7 +122,7 @@ void ExtensionOmniboxEventRouter::OnInputEntered(
 void ExtensionOmniboxEventRouter::OnInputCancelled(
     Profile* profile, const std::string& extension_id) {
   scoped_ptr<Event> event(new Event(
-      events::kOnInputCancelled, make_scoped_ptr(new ListValue())));
+      event_names::kOnInputCancelled, make_scoped_ptr(new ListValue())));
   event->restrict_to_profile = profile;
   ExtensionSystem::Get(profile)->event_router()->
       DispatchEventToExtension(extension_id, event.Pass());