Enclose break_iterator code with !UCONFIG_NO_BREAK_ITERATOR

src/i18n.h

 // 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.
 // limitations under the License.
 
 #ifndef V8_I18N_H_
 #define V8_I18N_H_
 
 #include "src/v8.h"
 #include "unicode/uversion.h"
 
 namespace U_ICU_NAMESPACE {
+#if !UCONFIG_NO_BREAK_ITERATION
 class BreakIterator;
+#endif
 class Collator;
 class DecimalFormat;
 class SimpleDateFormat;
 }
 
 namespace v8 {
 namespace internal {
 
 class I18N {
  public:
@@ skipping 71 matching lines @@
 
   // Release memory we allocated for the Collator once the JS object that holds
   // the pointer gets garbage collected.
   static void DeleteCollator(
       const v8::WeakCallbackData<v8::Value, void>& data);
 
  private:
   Collator();
 };
 
+#if !UCONFIG_NO_BREAK_ITERATION
 class BreakIterator {
  public:
   // Create a BreakIterator for the specificied locale and options. Returns the
   // resolved settings for the locale / options.
   static icu::BreakIterator* InitializeBreakIterator(
       Isolate* isolate,
       Handle<String> locale,
       Handle<JSObject> options,
       Handle<JSObject> resolved);
 
   // Unpacks break iterator object from corresponding JavaScript object.
   static icu::BreakIterator* UnpackBreakIterator(Isolate* isolate,
                                                  Handle<JSObject> obj);
 
   // Release memory we allocated for the BreakIterator once the JS object that
   // holds the pointer gets garbage collected.
   static void DeleteBreakIterator(
       const v8::WeakCallbackData<v8::Value, void>& data);
 
  private:
   BreakIterator();
 };
-
+#endif
 } }  // namespace v8::internal
 
 #endif  // V8_I18N_H_