Remove ImageData::dispose()

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index f2a50965cb56c90e9053189173815547399d28ba..8af725fcf1c1ad8af0811a11d5f2d6a99eed5ba0 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -599,7 +599,6 @@ String HTMLCanvasElement::toDataURLInternal(const String& mimeType, const double
     String encodingMimeType = toEncodingMimeType(mimeType, EncodeReasonToDataURL);
 
     ImageData* imageData = toImageData(sourceBuffer, SnapshotReasonToDataURL);
-    ScopedDisposal<ImageData> disposer(imageData);
 
     return ImageDataBuffer(imageData->size(), imageData->data()->data()).toDataURL(encodingMimeType, quality);
 }
@@ -644,8 +643,7 @@ void HTMLCanvasElement::toBlob(BlobCallback* callback, const String& mimeType, c
     String encodingMimeType = toEncodingMimeType(mimeType, EncodeReasonToBlobCallback);
 
     ImageData* imageData = toImageData(BackBuffer, SnapshotReasonToBlob);
-    // imageData unref its data, which we still keep alive for the async toBlob thread
-    ScopedDisposal<ImageData> disposer(imageData);
+
     CanvasAsyncBlobCreator* asyncCreator = CanvasAsyncBlobCreator::create(imageData->data(), encodingMimeType, imageData->size(), callback);
 
     if (encodingMimeType == DefaultMimeType)