Bug 1345712 - Fix rebasing failure r=jrmuizel

gfx/layers/wr/WebRenderImageLayer.cpp

@@ -131,12 +131,13 @@ WebRenderImageLayer::RenderLayer(wr::DisplayListBuilder& aBuilder)
   gfx::Rect relBounds = GetWrRelBounds();
   gfx::Rect overflow(0, 0, relBounds.width, relBounds.height);
 
-  gfx::Rect rect = RelativeToVisible(Rect(0, 0, size.width, size.height));
+  gfx::Rect rect = gfx::Rect(0, 0, size.width, size.height);
   if (mScaleMode != ScaleMode::SCALE_NONE) {
     NS_ASSERTION(mScaleMode == ScaleMode::STRETCH,
                  "No other scalemodes than stretch and none supported yet.");
     rect = gfx::Rect(0, 0, mScaleToSize.width, mScaleToSize.height);
   }
+  RelativeToVisible(rect);
   gfx::Rect clipRect = GetWrClipRect(rect);
 
   Maybe<WrImageMask> mask = BuildWrMaskLayer();