Revert r156303 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"
 
 namespace base {
 namespace win {
 
-namespace {
-bool g_should_tsf_aware_required = false;
-}
-
 HMODULE GetMetroModule() {
   const HMODULE kUninitialized = reinterpret_cast<HMODULE>(1);
   static HMODULE metro_module = kUninitialized;
 
   if (metro_module == kUninitialized) {
     // Initialize the cache, note that the initialization is idempotent
     // under the assumption that metro_driver is never unloaded, so the
     // race to this assignment is safe.
     metro_module = GetModuleHandleA("metro_driver.dll");
     if (metro_module != NULL) {
@@ skipping 37 matching lines @@
           ::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 g_should_tsf_aware_required || IsMetroProcess();
-}
-
-void SetForceToUseTSF() {
-  g_should_tsf_aware_required = true;
-
-  // Since Windows 8 Metro mode disables CUAS (Cicero Unaware Application
-  // Support) via ImmDisableLegacyIME API, Chrome must be fully TSF-aware on
-  // Metro mode. For debugging purposes, explicitly call ImmDisableLegacyIME so
-  // that one can test TSF functionality even on Windows 8 desktop mode. Note
-  // that CUAS cannot be disabled on Windows Vista/7 where ImmDisableLegacyIME
-  // is not available.
-  typedef BOOL (* ImmDisableLegacyIMEFunc)();
-  HMODULE imm32 = ::GetModuleHandleA("imm32.dll");
-  if (imm32 == NULL)
-    return;
-
-  ImmDisableLegacyIMEFunc imm_disable_legacy_ime =
-      reinterpret_cast<ImmDisableLegacyIMEFunc>(
-          ::GetProcAddress(imm32, "ImmDisableLegacyIME"));
-
-  if (imm_disable_legacy_ime == NULL) {
-    // Unsupported API, just do nothing.
-    return;
-  }
-
-  if (!imm_disable_legacy_ime()) {
-    DVLOG(1) << "Failed to disable legacy IME.";
-  }
+  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() {
@@ skipping 59 matching lines @@
         reinterpret_cast<GetInitialSearchString>(
             ::GetProcAddress(metro, "GetInitialSearchString"));
     DCHECK(initial_search_string);
     *params = initial_search_string();
   }
   return launch_type;
 }
 
 }  // namespace win
 }  // namespace base