cc: Stop using drawableContentRect for occlusion.

cc/layer_tree_host_impl.cc

Index: cc/layer_tree_host_impl.cc
diff --git a/cc/layer_tree_host_impl.cc b/cc/layer_tree_host_impl.cc
index cddbec75d02a5a56574fb679414dd5b457445962..bd362fbd457970b20e46d678375072ded7688bab 100644
--- a/cc/layer_tree_host_impl.cc
+++ b/cc/layer_tree_host_impl.cc
@@ -491,7 +491,7 @@ bool LayerTreeHostImpl::calculateRenderPasses(FrameData& frame)
         } else if (it.representsItself() && !it->visibleContentRect().IsEmpty()) {
             bool hasOcclusionFromOutsideTargetSurface;
             bool implDrawTransformIsUnknown = false;
-            if (occlusionTracker.occluded(it->renderTarget(), it->visibleContentRect(), it->drawTransform(), implDrawTransformIsUnknown, it->drawableContentRect(), &hasOcclusionFromOutsideTargetSurface))
+            if (occlusionTracker.occluded(it->renderTarget(), it->visibleContentRect(), it->drawTransform(), implDrawTransformIsUnknown, it->isClipped(), it->clipRect(), &hasOcclusionFromOutsideTargetSurface))
                 appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;
             else {
                 DCHECK_EQ(activeTree(), it->layerTreeImpl());