Refactor the IsKeyboardPresentOnSlate function.

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>
@@ skipping 357 matching lines @@
           FROM_HERE,
           base::Bind(ExecuteFontCacheBuildTask, path),
           base::TimeDelta::FromSeconds(kBuildFontCacheDelaySec));
     }
   }
 }
 
 void ChromeBrowserMainPartsWin::PostBrowserStart() {
   ChromeBrowserMainParts::PostBrowserStart();
 
-  UMA_HISTOGRAM_BOOLEAN("Windows.Tablet", base::win::IsTabletDevice());
+  UMA_HISTOGRAM_BOOLEAN("Windows.Tablet", base::win::IsTabletDevice(nullptr));
 
   // Set up a task to verify installed modules in the current process.
   content::BrowserThread::PostAfterStartupTask(
       FROM_HERE, content::BrowserThread::GetBlockingPool(),
       base::Bind(&VerifyInstallation));
 
   InitializeChromeElf();
 
 #if defined(KASKO)
   content::BrowserThread::PostDelayedTask(
@@ skipping 184 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);
 }