[Aura] Always use IMM32 on desktop Chrome (non-Ash mode)

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 53 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() {
-#if defined(USE_AURA)
-  if (base::win::GetVersion() >= base::win::VERSION_WIN8)
-    return true;
-#endif
   // 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
@@ skipping 90 matching lines @@
         reinterpret_cast<GetInitialSearchString>(
             ::GetProcAddress(metro, "GetInitialSearchString"));
     DCHECK(initial_search_string);
     *params = initial_search_string();
   }
   return launch_type;
 }
 
 }  // namespace win
 }  // namespace base