Revert of Eliminate copies of encoded image data

third_party/WebKit/Source/platform/image-decoders/SegmentReader.h

Index: third_party/WebKit/Source/platform/image-decoders/SegmentReader.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/SegmentReader.h b/third_party/WebKit/Source/platform/image-decoders/SegmentReader.h
deleted file mode 100644
index 13c28ce8a58ff7d60107848ea4e8f6a7e1e9894c..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/platform/image-decoders/SegmentReader.h
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2016 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 SegmentReader_h
-#define SegmentReader_h
-
-#include "platform/SharedBuffer.h"
-#include "third_party/skia/include/core/SkData.h"
-#include "third_party/skia/include/core/SkRWBuffer.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/ThreadSafeRefCounted.h"
-
-namespace blink {
-
-// Interface that looks like SharedBuffer. Used by ImageDecoders to use various
-// sources of input including:
-// - SharedBuffer
-//   - for when the caller already has a SharedBuffer
-// - SkData
-//   - for when the caller already has an SkData
-// - SkROBuffer
-//   - for when the caller wants to read/write in different threads
-//
-// Unlike SharedBuffer, this is a read-only interface. There is no way to
-// modify the underlying data source.
-class PLATFORM_EXPORT SegmentReader : public ThreadSafeRefCounted<SegmentReader> {
-    WTF_MAKE_NONCOPYABLE(SegmentReader);
-public:
-    // This version is thread-safe so long as no thread is modifying the
-    // underlying SharedBuffer. This class does not modify it, so that would
-    // mean modifying it in another way.
-    static PassRefPtr<SegmentReader> createFromSharedBuffer(PassRefPtr<SharedBuffer>);
-
-    // These versions use thread-safe input, so they are always thread-safe.
-    static PassRefPtr<SegmentReader> createFromSkData(PassRefPtr<SkData>);
-    static PassRefPtr<SegmentReader> createFromSkROBuffer(PassRefPtr<SkROBuffer>);
-
-    SegmentReader() {}
-    virtual ~SegmentReader() {}
-    virtual size_t size() const = 0;
-    virtual size_t getSomeData(const char*& data, size_t position) const = 0;
-    virtual PassRefPtr<SkData> getAsSkData() const = 0;
-};
-
-} // namespace blink
-#endif // SegmentReader_h