Move i18n break iterator C++ code to runtime

src/i18n.h

Index: src/i18n.h
diff --git a/src/i18n.h b/src/i18n.h
index 5825ab6c6c783652fa8872bba47d93d4f5d5e8ae..896db85d0d28b7f4ae77907c2dca5741f85b07e9 100644
--- a/src/i18n.h
+++ b/src/i18n.h
@@ -33,6 +33,7 @@
 #include "v8.h"
 
 namespace U_ICU_NAMESPACE {
+class BreakIterator;
 class Collator;
 class DecimalFormat;
 class SimpleDateFormat;
@@ -124,6 +125,30 @@ class Collator {
   Collator();
 };
 
+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(v8::Isolate* isolate,
+                                  Persistent<v8::Value>* object,
+                                  void* param);
+
+ private:
+  BreakIterator();
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_I18N_H_