Move InitializeICU() to the V8 API and use it.

src/icu_util.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
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 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 #include "icu_util.h"
 
-#if defined(_WIN32)
+#if defined(_WIN32) && defined(ENABLE_I18N_SUPPORT)
 #include <windows.h>
 
 #include "unicode/putil.h"
 #include "unicode/udata.h"
 
 #define ICU_UTIL_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
 #define ICU_UTIL_DATA_SHARED_MODULE_NAME "icudt.dll"
 #endif
 
 namespace v8 {
 
+namespace internal {
+
 bool InitializeICU() {
-#if defined(_WIN32)
+#if defined(_WIN32) && defined(ENABLE_I18N_SUPPORT)
   // We expect to find the ICU data module alongside the current module.
   HMODULE module = LoadLibraryA(ICU_UTIL_DATA_SHARED_MODULE_NAME);
   if (!module) return false;
 
   FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
   if (!addr) return false;
 
   UErrorCode err = U_ZERO_ERROR;
   udata_setCommonData(reinterpret_cast<void*>(addr), &err);
   return err == U_ZERO_ERROR;
 #else
   // Mac/Linux bundle the ICU data in.
   return true;
 #endif
 }
 
-}  // namespace v8
+} }  // namespace v8::internal