cc: Stop using drawableContentRect for occlusion.

cc/quad_culler.cc

Index: cc/quad_culler.cc
diff --git a/cc/quad_culler.cc b/cc/quad_culler.cc
index 416d4814ea5b0de5594700150aa40e23286552eb..95f44ae3982a1f88b201c55d531ff81865871042 100644
--- a/cc/quad_culler.cc
+++ b/cc/quad_culler.cc
@@ -73,7 +73,7 @@ bool QuadCuller::append(scoped_ptr<DrawQuad> drawQuad, AppendQuadsData& appendQu
     if (m_forSurface)
         culledRect = m_occlusionTracker.unoccludedContributingSurfaceContentRect(m_layer, false, drawQuad->rect, &hasOcclusionFromOutsideTargetSurface);
     else
-        culledRect = m_occlusionTracker.unoccludedContentRect(m_layer->renderTarget(), drawQuad->rect, drawQuad->quadTransform(), implDrawTransformIsUnknown, drawQuad->clippedRectInTarget(), &hasOcclusionFromOutsideTargetSurface);
+        culledRect = m_occlusionTracker.unoccludedContentRect(m_layer->renderTarget(), drawQuad->rect, drawQuad->quadTransform(), implDrawTransformIsUnknown, drawQuad->isClipped(), drawQuad->clippedRectInTarget(), &hasOcclusionFromOutsideTargetSurface);
 
     appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;