Remove dead DataView IDL and C++ code

Source/core/html/canvas/DataView.h

Index: Source/core/html/canvas/DataView.h
diff --git a/Source/core/html/canvas/DataView.h b/Source/core/html/canvas/DataView.h
deleted file mode 100644
index 98c0c1738586fcee43ffe447b0ae0fdd0a224e46..0000000000000000000000000000000000000000
--- a/Source/core/html/canvas/DataView.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  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 with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef DataView_h
-#define DataView_h
-
-#include "wtf/ArrayBufferView.h"
-
-namespace blink {
-
-class ExceptionState;
-
-class DataView final : public ArrayBufferView {
-public:
-    static PassRefPtr<DataView> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength);
-
-    virtual unsigned byteLength() const override { return m_byteLength; }
-    virtual ViewType type() const override { return TypeDataView; }
-
-    int16_t getInt16(unsigned byteOffset, bool littleEndian, ExceptionState&);
-    uint16_t getUint16(unsigned byteOffset, bool littleEndian, ExceptionState&);
-    int32_t getInt32(unsigned byteOffset, bool littleEndian, ExceptionState&);
-    uint32_t getUint32(unsigned byteOffset, bool littleEndian, ExceptionState&);
-    float getFloat32(unsigned byteOffset, bool littleEndian, ExceptionState&);
-    double getFloat64(unsigned byteOffset, bool littleEndian, ExceptionState&);
-
-    void setInt16(unsigned byteOffset, int16_t value, bool littleEndian, ExceptionState&);
-    void setUint16(unsigned byteOffset, uint16_t value, bool littleEndian, ExceptionState&);
-    void setInt32(unsigned byteOffset, int32_t value, bool littleEndian, ExceptionState&);
-    void setUint32(unsigned byteOffset, uint32_t value, bool littleEndian, ExceptionState&);
-    void setFloat32(unsigned byteOffset, float value, bool littleEndian, ExceptionState&);
-    void setFloat64(unsigned byteOffset, double value, bool littleEndian, ExceptionState&);
-
-protected:
-    virtual void neuter() override;
-
-private:
-    DataView(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned byteLength);
-
-    template<typename T>
-    bool beyondRange(unsigned byteOffset) const { return byteOffset >= m_byteLength || byteOffset + sizeof(T) > m_byteLength; }
-
-    template<typename T>
-    T getData(unsigned byteOffset, bool littleEndian, ExceptionState&) const;
-
-    template<typename T>
-    void setData(unsigned byteOffset, T value, bool littleEndian, ExceptionState&);
-
-    unsigned m_byteLength;
-};
-
-} // namespace blink
-
-#endif // DataView_h