Do not clip inside OcclusionTracker.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 750 matching lines @@
                                        contributing_render_pass,
                                        occlusion_tracker,
                                        &append_quads_data);
     } else if (it.represents_itself() &&
                !it->visible_content_rect().IsEmpty()) {
       bool impl_draw_transform_is_unknown = false;
       bool occluded = occlusion_tracker.Occluded(
               it->render_target(),
               it->visible_content_rect(),
               it->draw_transform(),
-              impl_draw_transform_is_unknown,
-              it->is_clipped(),
-              it->clip_rect());
+              impl_draw_transform_is_unknown);
       if (!occluded && it->WillDraw(draw_mode, resource_provider_.get())) {
         DCHECK_EQ(active_tree_, it->layer_tree_impl());
 
         frame->will_draw_layers.push_back(*it);
 
         if (it->HasContributingDelegatedRenderPasses()) {
           RenderPass::Id contributing_render_pass_id =
               it->FirstContributingRenderPassId();
           while (frame->render_passes_by_id.find(contributing_render_pass_id) !=
                  frame->render_passes_by_id.end()) {
@@ skipping 2018 matching lines @@
   std::set<UIResourceId>::iterator found_in_evicted =
       evicted_ui_resources_.find(uid);
   if (found_in_evicted == evicted_ui_resources_.end())
     return;
   evicted_ui_resources_.erase(found_in_evicted);
   if (evicted_ui_resources_.empty())
     client_->OnCanDrawStateChanged(CanDraw());
 }
 
 }  // namespace cc