Introduce FlexibleArrayBufferView and TypedFlexibleArrayBufferView

Source/core/dom/TypedFlexibleArrayBufferView.h

Index: Source/core/dom/TypedFlexibleArrayBufferView.h
diff --git a/Source/core/dom/TypedFlexibleArrayBufferView.h b/Source/core/dom/TypedFlexibleArrayBufferView.h
new file mode 100644
index 0000000000000000000000000000000000000000..73a3020c0b97e9c7921b0b74cc039550cc2a3956
--- /dev/null
+++ b/Source/core/dom/TypedFlexibleArrayBufferView.h
@@ -0,0 +1,32 @@
+// Copyright 2015 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.
+
+#ifndef TypedFlexibleArrayBufferView_h
+#define TypedFlexibleArrayBufferView_h
+
+#include "core/CoreExport.h"
+#include "core/dom/FlexibleArrayBufferView.h"
+#include "wtf/Noncopyable.h"
+
+namespace blink {
+
+template<typename WTFTypedArray>
+class CORE_TEMPLATE_CLASS_EXPORT TypedFlexibleArrayBufferView final : public FlexibleArrayBufferView {
+    DISALLOW_ALLOCATION();
+    WTF_MAKE_NONCOPYABLE(TypedFlexibleArrayBufferView);

[haraken, 2015/07/30 14:54:57]

Add WTF_MAKE_FAST_ALLOCATED.

[Michael Lippautz, 2015/07/30 17:06:15]

STACK_ALLOCATED() (?)

+public:
+    typedef typename WTFTypedArray::ValueType ValueType;

[haraken, 2015/07/30 14:54:57]

Use 'using'.

[Michael Lippautz, 2015/07/30 17:06:15]

Done.

+
+    TypedFlexibleArrayBufferView() : FlexibleArrayBufferView() {}
+
+    ValueType* data() const { return static_cast<ValueType*>(baseAddress()); }

[haraken, 2015/07/30 14:54:57]

I'd rename this to dataMaybeOnStack() or something.

[Michael Lippautz, 2015/07/30 17:06:15]

Done.

+    unsigned length() const { return byteLength() / sizeof(ValueType); }
+};
+
+typedef TypedFlexibleArrayBufferView<WTF::Float32Array> FlexibleFloat32ArrayView;
+typedef TypedFlexibleArrayBufferView<WTF::Int32Array> FlexibleInt32ArrayView;

[haraken, 2015/07/30 14:54:57]

Blink prefers 'using' in the new coding style.

[Michael Lippautz, 2015/07/30 17:06:15]

Done.

+
+} // namespace blink
+
+#endif // TypedFlexibleArrayBufferView_h