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

src/icu_util.cc

Index: src/icu_util.cc
diff --git a/src/icu_util.cc b/src/icu_util.cc
index aaafadc3eea2af9a598da66e5f358541934b0379..91f45278ee546d3b10db7321cbfdb3b1dcd3f4f4 100644
--- a/src/icu_util.cc
+++ b/src/icu_util.cc
@@ -27,7 +27,7 @@
 
 #include "icu_util.h"
 
-#if defined(_WIN32)
+#if defined(_WIN32) && defined(ENABLE_I18N_SUPPORT)
 #include <windows.h>
 
 #include "unicode/putil.h"
@@ -39,8 +39,10 @@
 
 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;
@@ -57,4 +59,4 @@ bool InitializeICU() {
 #endif
 }
 
-}  // namespace v8
+} }  // namespace v8::internal