Clean up transform methods in GraphicsContext.

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index 6ccdde05b9880b0ec9e205fa58f53f45a175f950..ca0144c1b67ca2008e51627fb1ffb1878b4da824 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -580,7 +580,7 @@ PassOwnPtr<DragImage> LocalFrame::nodeImage(Node& node)
     OwnPtr<ImageBuffer> buffer = ImageBuffer::create(paintingRect.size());
     if (!buffer)
         return nullptr;
-    buffer->context()->scale(FloatSize(deviceScaleFactor, deviceScaleFactor));
+    buffer->context()->scale(deviceScaleFactor, deviceScaleFactor);
     buffer->context()->translate(-paintingRect.x(), -paintingRect.y());
     buffer->context()->clip(FloatRect(0, 0, paintingRect.maxX(), paintingRect.maxY()));
 
@@ -609,7 +609,7 @@ PassOwnPtr<DragImage> LocalFrame::dragImageForSelection()
     OwnPtr<ImageBuffer> buffer = ImageBuffer::create(paintingRect.size());
     if (!buffer)
         return nullptr;
-    buffer->context()->scale(FloatSize(deviceScaleFactor, deviceScaleFactor));
+    buffer->context()->scale(deviceScaleFactor, deviceScaleFactor);
     buffer->context()->translate(-paintingRect.x(), -paintingRect.y());
     buffer->context()->clip(FloatRect(0, 0, paintingRect.maxX(), paintingRect.maxY()));