Do not clip inside OcclusionTracker.

cc/trees/quad_culler.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/quad_culler.h"
 
 #include "cc/debug/debug_colors.h"
 #include "cc/debug/overdraw_metrics.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/layer_impl.h"
@@ skipping 78 matching lines @@
   if (for_surface_) {
     culled_rect = occlusion_tracker_.UnoccludedContributingSurfaceContentRect(
         layer_,
         false,
         draw_quad->rect);
   } else {
     culled_rect = occlusion_tracker_.UnoccludedContentRect(
         layer_->render_target(),
         draw_quad->rect,
         draw_quad->quadTransform(),
-        impl_draw_transform_is_unknown,
-        draw_quad->isClipped(),
-        draw_quad->clipRect());
+        impl_draw_transform_is_unknown);
   }
 
   return AppendQuadInternal(draw_quad.Pass(),
                             culled_rect,
                             quad_list_,
                             occlusion_tracker_,
                             layer_,
                             show_culling_with_debug_border_quads_);
 }
 
 }  // namespace cc