blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/bindings/core/v8/ScriptValueSerializer.h

 // 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.
 
 #ifndef ScriptValueSerializer_h
 #define ScriptValueSerializer_h
 
 #include "base/gtest_prod_util.h"
 #include "bindings/core/v8/SerializationTag.h"
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "core/CoreExport.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 #include "wtf/typed_arrays/ArrayBufferContents.h"
 #include <v8.h>
 
 namespace blink {
 
 class CompositorProxy;
 class DOMArrayBuffer;
 class DOMArrayBufferView;
 class File;
 class FileList;
-class ImageData;
 class StaticBitmapImage;
 
 typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray;
 typedef Vector<RefPtr<StaticBitmapImage>, 1> ImageBitmapContentsArray;
 
 // V8ObjectMap is a map from V8 objects to arbitrary values of type T.
 // V8 objects (or handles to V8 objects) cannot be used as keys in ordinary
 // wtf::HashMaps; this class should be used instead. GCObject must be a subtype
 // of v8::Object.
 // Suggested usage:
@@ skipping 638 matching lines @@
   ArrayBufferContentsArray* m_arrayBufferContents;
   ImageBitmapContentsArray* m_imageBitmapContents;
   Vector<v8::Local<v8::Value>> m_arrayBuffers;
   Vector<v8::Local<v8::Value>> m_imageBitmaps;
   uint32_t m_version;
 };
 
 }  // namespace blink
 
 #endif  // ScriptValueSerializer_h