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

chrome/browser/ui/gtk/browser_toolbar_gtk.cc

Index: chrome/browser/ui/gtk/browser_toolbar_gtk.cc
diff --git a/chrome/browser/ui/gtk/browser_toolbar_gtk.cc b/chrome/browser/ui/gtk/browser_toolbar_gtk.cc
index 0cd5a1a8433c0cf80e739dafd478fc3ad43fbd60..11c88f74db96a83d2fe436b235a07b6703d65f5a 100644
--- a/chrome/browser/ui/gtk/browser_toolbar_gtk.cc
+++ b/chrome/browser/ui/gtk/browser_toolbar_gtk.cc
@@ -43,9 +43,9 @@
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/tab_contents/tab_contents.h"
-#include "content/browser/user_metrics.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/user_metrics.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
@@ -59,6 +59,8 @@
 #include "ui/gfx/image/cairo_cached_surface.h"
 #include "ui/gfx/skbitmap_operations.h"
 
+using content::UserMetricsAction;
+
 namespace {
 
 // Padding on left and right of the left toolbar buttons (back, forward, reload,
@@ -291,7 +293,7 @@ void BrowserToolbarGtk::ShowAppMenu() {
     RebuildWrenchMenu();
 
   wrench_menu_button_->SetPaintOverride(GTK_STATE_ACTIVE);
-  UserMetrics::RecordAction(UserMetricsAction("ShowAppMenu"));
+  content::RecordAction(UserMetricsAction("ShowAppMenu"));
   wrench_menu_->PopupAsFromKeyEvent(wrench_menu_button_->widget());
 }