Move i18n's number-format C++ code to runtime

src/i18n.h

Index: src/i18n.h
diff --git a/src/i18n.h b/src/i18n.h
index 37c57b135bfb3626112044eb207d8221fbb51cbb..b9cbed1bbe8c3843b2a688d746beb4e8366bc1fe 100644
--- a/src/i18n.h
+++ b/src/i18n.h
@@ -33,6 +33,7 @@
 #include "v8.h"
 
 namespace U_ICU_NAMESPACE {
+class DecimalFormat;
 class SimpleDateFormat;
 }
 
@@ -51,6 +52,7 @@ class I18N {
   I18N();
 };
 
+
 class DateFormat {
  public:
   // Create a formatter for the specificied locale and options. Returns the
@@ -74,6 +76,30 @@ class DateFormat {
   DateFormat();
 };
 
+
+class NumberFormat {
+ public:
+  // Create a formatter for the specificied locale and options. Returns the
+  // resolved settings for the locale / options.
+  static icu::DecimalFormat* InitializeNumberFormat(
+      Isolate* isolate,
+      Handle<String> locale,
+      Handle<JSObject> options,
+      Handle<JSObject> resolved);
+
+  // Unpacks number format object from corresponding JavaScript object.
+  static icu::DecimalFormat* UnpackNumberFormat(Isolate* isolate,
+                                                Handle<JSObject> obj);
+
+  // Release memory we allocated for the NumberFormat once the JS object that
+  // holds the pointer gets garbage collected.
+  static void DeleteNumberFormat(v8::Isolate* isolate,
+                                 Persistent<v8::Object>* object,
+                                 void* param);
+ private:
+  NumberFormat();
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_I18N_H_