Add UMA stats for tracking bookmark depth

chrome/browser/ui/views/bookmarks/bookmark_context_menu_controller_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/bookmarks/bookmark_context_menu_controller.h"
 
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/bookmarks/bookmark_stats.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/bookmarks/bookmark_utils.h"
@@ skipping 106 matching lines @@
         PageNavigator* navigator = NULL;
         if (!browser || !browser->tab_strip_model()->GetActiveWebContents()) {
           navigator = &navigator_impl;
         } else {
           browser->window()->Activate();
           navigator = browser->tab_strip_model()->GetActiveWebContents();
         }
 
         chrome::OpenAll(parent_window_, navigator, selection_,
                         NEW_FOREGROUND_TAB, profile_to_use);
-        RecordBookmarkLaunch(BOOKMARK_LAUNCH_LOCATION_CONTEXT_MENU);
+        for (size_t i = 0; i < selection_.size(); ++i) {
+          RecordBookmarkLaunch(selection_[i],
+                               BOOKMARK_LAUNCH_LOCATION_CONTEXT_MENU);
+        }
         return true;
       }
 
       default:
         break;
     }
   }
 
   return false;
 }