cc: Remove code for drawing checkerboard quads, it's not used.

cc/layers/layer_unittest.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/layers/layer.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
@@ skipping 612 matching lines @@
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetShouldScrollOnMainThread(true));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetNonFastScrollableRegion(
       Region(gfx::Rect(1, 1, 2, 2))));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetHaveWheelEventHandlers(true));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetHaveScrollEventHandlers(true));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetTransform(
       gfx::Transform(0.0, 0.0, 0.0, 0.0, 0.0, 0.0)));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetDoubleSided(false));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetTouchEventHandlerRegion(
       gfx::Rect(10, 10)));
-  EXPECT_SET_NEEDS_COMMIT(
-      1,
-      test_layer->SetDrawCheckerboardForMissingTiles(
-          !test_layer->draw_checkerboard_for_missing_tiles()));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetForceRenderSurface(true));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetHideLayerAndSubtree(true));
 
   EXPECT_SET_NEEDS_FULL_TREE_SYNC(1, test_layer->SetMaskLayer(
       dummy_layer1.get()));
   EXPECT_SET_NEEDS_FULL_TREE_SYNC(1, test_layer->SetReplicaLayer(
       dummy_layer2.get()));
 
   // The above tests should not have caused a change to the needs_display flag.
   EXPECT_FALSE(test_layer->NeedsDisplayForTesting());
@@ skipping 678 matching lines @@
   // When the layer is destroyed, the other three requests should be aborted.
   layer = nullptr;
   EXPECT_EQ(1, did_receive_first_result_from_this_source);
   EXPECT_EQ(1, did_receive_result_from_different_source);
   EXPECT_EQ(1, did_receive_result_from_anonymous_source);
   EXPECT_EQ(1, did_receive_second_result_from_this_source);
 }
 
 }  // namespace
 }  // namespace cc