cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/picture_image_layer_impl_unittest.cc

 // Copyright 2013 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/layers/picture_image_layer_impl.h"
 
 #include "cc/layers/append_quads_data.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_picture_layer_tiling_client.h"
 #include "cc/test/impl_side_painting_settings.h"
-#include "cc/test/mock_occlusion_tracker.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/size_conversions.h"
 
 namespace cc {
 namespace {
 
 class TestablePictureImageLayerImpl : public PictureImageLayerImpl {
  public:
@@ skipping 116 matching lines @@
   EXPECT_EQ(1.f, active_layer->tilings()->tiling_at(0)->contents_scale());
 
   // Create tile and resource.
   active_layer->tilings()->tiling_at(0)->CreateAllTilesForTesting();
   host_impl_.tile_manager()->InitializeTilesWithResourcesForTesting(
       active_layer->tilings()->tiling_at(0)->AllTilesForTesting());
 
   // Draw.
   active_layer->draw_properties().visible_content_rect =
       gfx::Rect(gfx::ToCeiledSize(active_layer->bounds()));
-  MockOcclusionTracker<LayerImpl> occlusion_tracker;
   scoped_ptr<RenderPass> render_pass = RenderPass::Create();
   AppendQuadsData data;
   active_layer->WillDraw(DRAW_MODE_SOFTWARE, NULL);
-  active_layer->AppendQuads(render_pass.get(), occlusion_tracker, &data);
+  active_layer->AppendQuads(render_pass.get(), Occlusion(), &data);
   active_layer->DidDraw(NULL);
 
   EXPECT_EQ(DrawQuad::TILED_CONTENT, render_pass->quad_list.front()->material);
 
   // Tiles are ready at correct scale, so should not set had_incomplete_tile.
   EXPECT_EQ(0, data.num_incomplete_tiles);
 }
 
 }  // namespace
 }  // namespace cc