Add bookmark entry point histogram for bookmark prompt experiment

chrome/browser/ui/views/frame/browser_view.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/views/frame/browser_view.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 2381 matching lines @@
   }
 #endif
 }
 
 void BrowserView::UpdateAcceleratorMetrics(
     const ui::Accelerator& accelerator, int command_id) {
   const ui::KeyboardCode key_code = accelerator.key_code();
   if (command_id == IDC_HELP_PAGE_VIA_KEYBOARD && key_code == ui::VKEY_F1)
     content::RecordAction(UserMetricsAction("ShowHelpTabViaF1"));
 
+  if (command_id == IDC_BOOKMARK_PAGE)
+    UMA_HISTOGRAM_ENUMERATION("Bookmarks.EntryPoint", location,
+                              BOOKMARK_ENTRY_POINT_ACCELERATOR);
+
 #if defined(OS_CHROMEOS)
   // Collect information about the relative popularity of various accelerators
   // on Chrome OS.
   switch (command_id) {
     case IDC_BACK:
       if (key_code == ui::VKEY_BACK)
         content::RecordAction(UserMetricsAction("Accel_Back_Backspace"));
       else if (key_code == ui::VKEY_F1)
         content::RecordAction(UserMetricsAction("Accel_Back_F1"));
       else if (key_code == ui::VKEY_LEFT)
@@ skipping 198 matching lines @@
 
   Browser* modal_browser =
       browser::FindBrowserWithWebContents(active_dialog->web_contents());
   if (modal_browser && (browser_ != modal_browser)) {
     modal_browser->window()->FlashFrame(true);
     modal_browser->window()->Activate();
   }
 
   AppModalDialogQueue::GetInstance()->ActivateModalDialog();
 }