Break dependency of platform/graphics on html/ImageData.h

Source/core/platform/image-encoders/skia/JPEGImageEncoder.h

Index: Source/core/platform/image-encoders/skia/JPEGImageEncoder.h
diff --git a/Source/core/platform/image-encoders/skia/JPEGImageEncoder.h b/Source/core/platform/image-encoders/skia/JPEGImageEncoder.h
index ca3ef4886ea0f5bccbbf3cb80d39f7121169b62e..8c53446d906917cc916fc38a8e16f6ece3aa7f21 100644
--- a/Source/core/platform/image-encoders/skia/JPEGImageEncoder.h
+++ b/Source/core/platform/image-encoders/skia/JPEGImageEncoder.h
@@ -37,13 +37,13 @@ class SkBitmap;
 
 namespace WebCore {
 
-class ImageData;
+struct ImageDataBuffer;
 
 class JPEGImageEncoder {
 public:
     // Encode the input data with a compression quality in [0-100].
     static bool encode(const SkBitmap&, int quality, Vector<unsigned char>*);
-    static bool encode(const ImageData&, int quality, Vector<unsigned char>*);
+    static bool encode(const ImageDataBuffer&, int quality, Vector<unsigned char>*);
 
     // For callers: provide a reasonable compression quality default.
     enum Quality { DefaultCompressionQuality = 92 };