Add Cast() for Int32 and Uint32

include/v8.h

 // Copyright 2012 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 2447 matching lines @@
   static void CheckCast(v8::Value* obj);
 };
 
 
 /**
  * A JavaScript value representing a 32-bit signed integer.
  */
 class V8_EXPORT Int32 : public Integer {
  public:
   int32_t Value() const;
+  V8_INLINE static Int32* Cast(v8::Value* obj);
+
  private:
   Int32();
+  static void CheckCast(v8::Value* obj);
 };
 
 
 /**
  * A JavaScript value representing a 32-bit unsigned integer.
  */
 class V8_EXPORT Uint32 : public Integer {
  public:
   uint32_t Value() const;
+  V8_INLINE static Uint32* Cast(v8::Value* obj);
+
  private:
   Uint32();
+  static void CheckCast(v8::Value* obj);
 };
 
 
 enum PropertyAttribute {
   None       = 0,
   ReadOnly   = 1 << 0,
   DontEnum   = 1 << 1,
   DontDelete = 1 << 2
 };
 
@@ skipping 4866 matching lines @@
 
 
 Integer* Integer::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Integer*>(value);
 }
 
 
+Int32* Int32::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Int32*>(value);
+}
+
+
+Uint32* Uint32::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Uint32*>(value);
+}
+
+
 Date* Date::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
 #endif
   return static_cast<Date*>(value);
 }
 
 
 StringObject* StringObject::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
@@ skipping 469 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_