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

chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
index 392c7ca623d000ad1e3d3cd9f8c08cbf94c51ff2..0603733677e4b746201987ee4228c75f2e4f9e53 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.mm
@@ -10,11 +10,13 @@
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_menu.h"
 #import "chrome/browser/ui/cocoa/image_utils.h"
-#include "content/browser/user_metrics.h"
+#include "content/public/browser/user_metrics.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/gfx/mac/nsimage_cache.h"
 
+using content::UserMetricsAction;
+
 
 @interface BookmarkButtonCell(Private)
 - (void)configureBookmarkButtonCell;
@@ -151,9 +153,9 @@
       static_cast<const BookmarkNode*>([[self representedObject] pointerValue]);
 
   if (node->parent() && node->parent()->type() == BookmarkNode::FOLDER) {
-    UserMetrics::RecordAction(UserMetricsAction("BookmarkBarFolder_CtxMenu"));
+    content::RecordAction(UserMetricsAction("BookmarkBarFolder_CtxMenu"));
   } else {
-    UserMetrics::RecordAction(UserMetricsAction("BookmarkBar_CtxMenu"));
+    content::RecordAction(UserMetricsAction("BookmarkBar_CtxMenu"));
   }
 
   [menu setRepresentedObject:[NSNumber numberWithLongLong:node->id()]];