Revert r151669 and r155589 as non-Aura Metro mode is gone

base/win/metro.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 "base/win/metro.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
@@ skipping 48 matching lines @@
 
   IsImmersiveProcessFunc is_immersive_process =
       reinterpret_cast<IsImmersiveProcessFunc>(
           ::GetProcAddress(user32, "IsImmersiveProcess"));
 
   if (is_immersive_process)
     return is_immersive_process(process) ? true: false;
   return false;
 }
 
-bool IsTSFAwareRequired() {
-  // Although this function is equal to IsMetroProcess at this moment,
-  // Chrome for Win7 and Vista may support TSF in the future.
-  return IsMetroProcess();
-}
-
 wchar_t* LocalAllocAndCopyString(const string16& src) {
   size_t dest_size = (src.length() + 1) * sizeof(wchar_t);
   wchar_t* dest = reinterpret_cast<wchar_t*>(LocalAlloc(LPTR, dest_size));
   base::wcslcpy(dest, src.c_str(), dest_size);
   return dest;
 }
 
 bool IsParentalControlActivityLoggingOn() {
   // Query this info on Windows Vista and above.
   if (base::win::GetVersion() < base::win::VERSION_VISTA)
@@ skipping 57 matching lines @@
         reinterpret_cast<GetInitialSearchString>(
             ::GetProcAddress(metro, "GetInitialSearchString"));
     DCHECK(initial_search_string);
     *params = initial_search_string();
   }
   return launch_type;
 }
 
 }  // namespace win
 }  // namespace base