Implement tex{Sub}Image{2|3}D with ArrayBufferView sub source.

third_party/WebKit/Source/core/dom/DOMDataView.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/DOMDataView.h"
 
 #include "bindings/core/v8/DOMDataStore.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "platform/CheckedInt.h"
 #include "wtf/typed_arrays/ArrayBufferView.h"
@@ skipping 10 matching lines @@
         CheckedInt<uint32_t> checkedOffset(byteOffset);
         CheckedInt<uint32_t> checkedLength(byteLength);
         CheckedInt<uint32_t> checkedMax = checkedOffset + checkedLength;
         RELEASE_ASSERT(checkedMax.isValid());
         RELEASE_ASSERT(checkedMax.value() <= buffer->byteLength());
         return adoptRef(new DataView(buffer, byteOffset, byteLength));
     }
 
     unsigned byteLength() const override { return m_byteLength; }
     ViewType type() const override { return TypeDataView; }
+    unsigned typeSize() const override { return 1; }
 
 protected:
     void neuter() override
     {
         ArrayBufferView::neuter();
         m_byteLength = 0;
     }
 
 private:
     DataView(ArrayBuffer* buffer, unsigned byteOffset, unsigned byteLength)
@@ skipping 20 matching lines @@
     if (v8Buffer.IsEmpty())
         return v8::Local<v8::Object>();
     DCHECK(v8Buffer->IsArrayBuffer());
 
     v8::Local<v8::Object> wrapper = v8::DataView::New(v8Buffer.As<v8::ArrayBuffer>(), byteOffset(), byteLength());
 
     return associateWithWrapper(isolate, wrapperTypeInfo, wrapper);
 }
 
 } // namespace blink