Apply numeric casts correctly in typed arrays and related code.

src/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 347 matching lines @@
   F(GetObservationState, 0, 1) \
   F(ObservationWeakMapCreate, 0, 1) \
   F(UnwrapGlobalProxy, 1, 1) \
   F(IsAccessAllowedForObserver, 3, 1) \
   \
   /* Harmony typed arrays */ \
   F(ArrayBufferInitialize, 2, 1)\
   F(ArrayBufferGetByteLength, 1, 1)\
   F(ArrayBufferSliceImpl, 3, 1) \
   F(ArrayBufferIsView, 1, 1) \
+  F(ArrayBufferNeuter, 1, 1) \
   \
   F(TypedArrayInitialize, 5, 1) \
   F(TypedArrayInitializeFromArrayLike, 4, 1) \
   F(TypedArrayGetBuffer, 1, 1) \
   F(TypedArrayGetByteLength, 1, 1) \
   F(TypedArrayGetByteOffset, 1, 1) \
   F(TypedArrayGetLength, 1, 1) \
   F(TypedArraySetFastCases, 3, 1) \
   \
   F(DataViewInitialize, 4, 1) \
@@ skipping 443 matching lines @@
                                bool is_external,
                                void* data,
                                size_t allocated_length);
 
   static bool SetupArrayBufferAllocatingData(
       Isolate* isolate,
       Handle<JSArrayBuffer> array_buffer,
       size_t allocated_length,
       bool initialize = true);
 
+  static void NeuterArrayBuffer(Handle<JSArrayBuffer> array_buffer);
+
   static void FreeArrayBuffer(
       Isolate* isolate,
       JSArrayBuffer* phantom_array_buffer);
 
   enum TypedArrayId {
     // arrayIds below should be synchromized with typedarray.js natives.
     ARRAY_ID_UINT8 = 1,
     ARRAY_ID_INT8 = 2,
     ARRAY_ID_UINT16 = 3,
     ARRAY_ID_INT16 = 4,
@@ skipping 24 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_