Tidy up Android's is-tablet functionality.

chrome/browser/android/chrome_startup_flags.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 <jni.h>
 
 #include "chrome/browser/android/chrome_startup_flags.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 10 matching lines @@
     command_line->AppendSwitch(switch_string);
 }
 
 void SetCommandLineSwitchASCII(const std::string& switch_string,
                                const std::string& value) {
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (!command_line->HasSwitch(switch_string))
     command_line->AppendSwitchASCII(switch_string, value);
 }
 
-bool IsTabletUi() {
-  NOTIMPLEMENTED() << "TODO(yfriedman): Upstream this";
-  return false;
-}
-
 }  // namespace
 
 void SetChromeSpecificCommandLineFlags() {
   // Always enable SPDY.
   SetCommandLineSwitch(switches::kEnableNpn);
 
   // Turn on autofill.
   SetCommandLineSwitch(switches::kExternalAutofillPopup);
 
   // Turn on autologin.
   SetCommandLineSwitch(switches::kEnableAutologin);
 
-  // Tablet UI switch (used for using correct version of NTP HTML).
-  if (IsTabletUi())
-    SetCommandLineSwitch(switches::kTabletUi);
-
   // Enable prerender for the omnibox.
   SetCommandLineSwitchASCII(
       switches::kPrerenderMode, switches::kPrerenderModeSwitchValueEnabled);
   SetCommandLineSwitchASCII(
       switches::kPrerenderFromOmnibox,
       switches::kPrerenderFromOmniboxSwitchValueEnabled);
 }