Update from https://crrev.com/316786

cc/base/switches.cc

 // Copyright (c) 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/base/switches.h"
 
 #include "base/command_line.h"
 
 namespace cc {
 namespace switches {
@@ skipping 81 matching lines @@
 // layer.
 const char kShowScreenSpaceRects[] = "show-screenspace-rects";
 const char kUIShowScreenSpaceRects[] = "ui-show-screenspace-rects";
 
 // Show rects in the HUD around the screen-space transformed bounds of every
 // layer's replica, when they have one.
 const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects";
 const char kUIShowReplicaScreenSpaceRects[] =
     "ui-show-replica-screenspace-rects";
 
-// Show rects in the HUD wherever something is known to be drawn opaque and is
-// considered occluding the pixels behind it.
-const char kShowOccludingRects[] = "show-occluding-rects";
-const char kUIShowOccludingRects[] = "ui-show-occluding-rects";
-
-// Show rects in the HUD wherever something is not known to be drawn opaque and
-// is not considered to be occluding the pixels behind it.
-const char kShowNonOccludingRects[] = "show-nonoccluding-rects";
-const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
-
 // Prevents the layer tree unit tests from timing out.
 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
 }  // namespace switches
 }  // namespace cc