Add bookmark entry point histogram for bookmark prompt experiment

chrome/browser/bookmarks/bookmark_utils.h

 // 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.
 
 #ifndef CHROME_BROWSER_BOOKMARKS_BOOKMARK_UTILS_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_UTILS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 213 matching lines @@
 // Removes all bookmarks for the given |url|.
 void RemoveAllBookmarks(BookmarkModel* model, const GURL& url);
 
 // Number of bookmarks we'll open before prompting the user to see if they
 // really want to open all.
 //
 // NOTE: treat this as a const. It is not const as various tests change the
 // value.
 extern int num_urls_before_prompting;
 
+// This enum is used for the Bookmarks.EntryPoint histogram.
+enum BoomarkEntryPoint {
+  ENTRY_POINT_NONE,

[sky, 2012/09/11 15:49:52]

This is never used, can it be removed?

+  ENTRY_POINT_ACCELERATOR = 0,
+  ENTRY_POINT_STAR_GESTURE,
+  ENTRY_POINT_STAR_KEY,
+  ENTRY_POINT_STAR_MOUSE,
+
+  ENTRY_POINT_LIMIT // Keep this last.
+};
+
 // This enum is used for the Bookmarks.LaunchLocation histogram.
 enum BookmarkLaunchLocation {
   LAUNCH_NONE,
   LAUNCH_ATTACHED_BAR = 0,
   LAUNCH_DETACHED_BAR,
   // These two are kind of sub-categories of the bookmark bar. Generally
   // a launch from a context menu or subfolder could be classified in one of
   // the other two bar buckets, but doing so is difficult because the menus
   // don't know of their greater place in Chrome.
   LAUNCH_BAR_SUBFOLDER,
@@ skipping 13 matching lines @@
 void RecordBookmarkLaunch(BookmarkLaunchLocation location);
 
 #if defined(OS_WIN) || defined(OS_CHROMEOS) || defined(USE_AURA)
 void DisableBookmarkBarViewAnimationsForTesting(bool disabled);
 bool IsBookmarkBarViewAnimationsDisabled();
 #endif
 
 }  // namespace bookmark_utils
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_UTILS_H_