Oilpan: keep ImageData on the heap by default.

Source/bindings/core/v8/ScriptValueSerializer.cpp

Index: Source/bindings/core/v8/ScriptValueSerializer.cpp
diff --git a/Source/bindings/core/v8/ScriptValueSerializer.cpp b/Source/bindings/core/v8/ScriptValueSerializer.cpp
index 21908d25933fdcc104cdd07bcfa04ce33d7f5fc1..4e79076bf14e711b54d7be1603a016e1910f5de3 100644
--- a/Source/bindings/core/v8/ScriptValueSerializer.cpp
+++ b/Source/bindings/core/v8/ScriptValueSerializer.cpp
@@ -1400,13 +1400,13 @@ bool SerializedScriptValueReader::readImageData(v8::Local<v8::Value>* value)
         return false;
     if (m_position + pixelDataLength > m_length)
         return false;
-    RefPtrWillBeRawPtr<ImageData> imageData = ImageData::create(IntSize(width, height));
+    ImageData* imageData = ImageData::create(IntSize(width, height));
     DOMUint8ClampedArray* pixelArray = imageData->data();
     ASSERT(pixelArray);
     ASSERT(pixelArray->length() >= pixelDataLength);
     memcpy(pixelArray->data(), m_buffer + m_position, pixelDataLength);
     m_position += pixelDataLength;
-    *value = toV8(imageData.release(), m_scriptState->context()->Global(), isolate());
+    *value = toV8(imageData, m_scriptState->context()->Global(), isolate());
     return true;
 }