Revert of Turn libbase into a component

src/icu_util.cc

 // Copyright 2013 the V8 project 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 "src/icu_util.h"
 
 #if defined(_WIN32)
 #include <windows.h>
 #endif
 
@@ skipping 34 matching lines @@
                                   const char* icu_data_file) {
 #if !defined(V8_I18N_SUPPORT)
   return true;
 #else
 #if ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE
   if (icu_data_file) {
     return InitializeICU(icu_data_file);
   }
   char* icu_data_file_default;
 #if defined(V8_TARGET_LITTLE_ENDIAN)
-  base::RelativePath(&icu_data_file_default, exec_path, "icudtl.dat");
+  RelativePath(&icu_data_file_default, exec_path, "icudtl.dat");
 #elif defined(V8_TARGET_BIG_ENDIAN)
-  base::RelativePath(&icu_data_file_default, exec_path, "icudtb.dat");
+  RelativePath(&icu_data_file_default, exec_path, "icudtb.dat");
 #else
 #error Unknown byte ordering
 #endif
   bool result = InitializeICU(icu_data_file_default);
   free(icu_data_file_default);
   return result;
 #else
   return InitializeICU(NULL);
 #endif
 #endif
@@ skipping 42 matching lines @@
 
   UErrorCode err = U_ZERO_ERROR;
   udata_setCommonData(reinterpret_cast<void*>(g_icu_data_ptr), &err);
   return err == U_ZERO_ERROR;
 #endif
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8