Resubmit "Add an UMA metric to track whether running on a tablet".

chrome/browser/chrome_browser_main_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/chrome_browser_main_win.h"
 
 #include <windows.h>
 #include <shellapi.h>
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/scoped_native_library.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/metro.h"
+#include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "base/win/wrapped_window_proc.h"
 #include "chrome/browser/browser_util_win.h"
 #include "chrome/browser/chrome_elf_init_win.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/install_verification/win/install_verification.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_shortcut_manager.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/simple_message_box.h"
@@ skipping 206 matching lines @@
 void ChromeBrowserMainPartsWin::ShowMissingLocaleMessageBox() {
   ui::MessageBox(NULL,
                  base::ASCIIToUTF16(chrome_browser::kMissingLocaleDataMessage),
                  base::ASCIIToUTF16(chrome_browser::kMissingLocaleDataTitle),
                  MB_OK | MB_ICONERROR | MB_TOPMOST);
 }
 
 void ChromeBrowserMainPartsWin::PostBrowserStart() {
   ChromeBrowserMainParts::PostBrowserStart();
 
+  UMA_HISTOGRAM_BOOLEAN("Windows.Tablet", base::win::IsTabletDevice());
+
   // Set up a task to verify installed modules in the current process. Use a
   // delay to reduce the impact on startup time.
   content::BrowserThread::GetMessageLoopProxyForThread(
       content::BrowserThread::UI)->PostDelayedTask(
           FROM_HERE,
           base::Bind(&VerifyInstallation),
           base::TimeDelta::FromSeconds(45));
 
   InitializeChromeElf();
 }
@@ skipping 178 matching lines @@
   if (resource_id)
     return l10n_util::GetStringUTF16(resource_id);
   return base::string16();
 }
 
 // static
 void ChromeBrowserMainPartsWin::SetupInstallerUtilStrings() {
   CR_DEFINE_STATIC_LOCAL(TranslationDelegate, delegate, ());
   installer::SetTranslationDelegate(&delegate);
 }