Split UserMetrics into API vs. implementation. Move API to content/public.

chrome/browser/web_resource/notification_promo.cc

Index: chrome/browser/web_resource/notification_promo.cc
diff --git a/chrome/browser/web_resource/notification_promo.cc b/chrome/browser/web_resource/notification_promo.cc
index e3d12e4d7a327d63b2ea4ef3674a8cdf74211f97..cd6b19b9f972a67cf4eb522af0941ba47c164f4b 100644
--- a/chrome/browser/web_resource/notification_promo.cc
+++ b/chrome/browser/web_resource/notification_promo.cc
@@ -16,11 +16,13 @@
 #include "chrome/browser/profiles/profile_impl.h"
 #include "chrome/browser/web_resource/promo_resource_service.h"
 #include "chrome/common/pref_names.h"
-#include "content/browser/user_metrics.h"
+#include "content/public/browser/user_metrics.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/cookie_store.h"
 #include "net/url_request/url_request_context.h"
 
+using content::UserMetricsAction;
+
 namespace {
 
 // Maximum number of views.
@@ -335,12 +337,12 @@ bool NotificationPromo::CanShow() const {
 }
 
 void NotificationPromo::HandleClosed() {
-  UserMetrics::RecordAction(UserMetricsAction("NTPPromoClosed"));
+  content::RecordAction(UserMetricsAction("NTPPromoClosed"));
   prefs_->SetBoolean(prefs::kNTPPromoClosed, true);
 }
 
 bool NotificationPromo::HandleViewed() {
-  UserMetrics::RecordAction(UserMetricsAction("NTPPromoShown"));
+  content::RecordAction(UserMetricsAction("NTPPromoShown"));
   if (prefs_->HasPrefPath(prefs::kNTPPromoViewsMax))
     max_views_ = prefs_->GetInteger(prefs::kNTPPromoViewsMax);