DataView implementation.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index a14c626beda7d587d2889ba6287cd6013ab0503a..fb6ac8d678289925530f6e2fa80fcd7886cf91da 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -695,6 +695,14 @@ bool Object::IsBoolean() {
 TYPE_CHECKER(JSArray, JS_ARRAY_TYPE)
 TYPE_CHECKER(JSArrayBuffer, JS_ARRAY_BUFFER_TYPE)
 TYPE_CHECKER(JSTypedArray, JS_TYPED_ARRAY_TYPE)
+TYPE_CHECKER(JSDataView, JS_DATA_VIEW_TYPE)
+
+
+bool Object::IsJSArrayBufferView() {
+  return IsJSDataView() || IsJSTypedArray();
+}
+
+
 TYPE_CHECKER(JSRegExp, JS_REGEXP_TYPE)
 
 
@@ -1673,6 +1681,8 @@ int JSObject::GetHeaderSize() {
       return JSArrayBuffer::kSize;
     case JS_TYPED_ARRAY_TYPE:
       return JSTypedArray::kSize;
+    case JS_DATA_VIEW_TYPE:
+      return JSDataView::kSize;
     case JS_SET_TYPE:
       return JSSet::kSize;
     case JS_MAP_TYPE:
@@ -2551,7 +2561,9 @@ CAST_ACCESSOR(JSBuiltinsObject)
 CAST_ACCESSOR(Code)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
+CAST_ACCESSOR(JSArrayBufferView)
 CAST_ACCESSOR(JSTypedArray)
+CAST_ACCESSOR(JSDataView)
 CAST_ACCESSOR(JSRegExp)
 CAST_ACCESSOR(JSProxy)
 CAST_ACCESSOR(JSFunctionProxy)
@@ -5298,14 +5310,14 @@ void JSArrayBuffer::set_is_external(bool value) {
 
 
 ACCESSORS(JSArrayBuffer, weak_next, Object, kWeakNextOffset)
-ACCESSORS(JSArrayBuffer, weak_first_array, Object, kWeakFirstArrayOffset)
+ACCESSORS(JSArrayBuffer, weak_first_view, Object, kWeakFirstViewOffset)
 
 
-ACCESSORS(JSTypedArray, buffer, Object, kBufferOffset)
-ACCESSORS(JSTypedArray, byte_offset, Object, kByteOffsetOffset)
-ACCESSORS(JSTypedArray, byte_length, Object, kByteLengthOffset)
+ACCESSORS(JSArrayBufferView, buffer, Object, kBufferOffset)
+ACCESSORS(JSArrayBufferView, byte_offset, Object, kByteOffsetOffset)
+ACCESSORS(JSArrayBufferView, byte_length, Object, kByteLengthOffset)
+ACCESSORS(JSArrayBufferView, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSTypedArray, length, Object, kLengthOffset)
-ACCESSORS(JSTypedArray, weak_next, Object, kWeakNextOffset)
 
 ACCESSORS(JSRegExp, data, Object, kDataOffset)