Add a hide_layer_and_subtree() flag to cc::Layer

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 "cc/animation/keyframed_animation_curve.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/resources/layer_painter.h"
@@ skipping 510 matching lines @@
   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->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->SetDebugName("Test Layer"));
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetDrawCheckerboardForMissingTiles(
       !test_layer->DrawCheckerboardForMissingTiles()));
   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());
 
   // As layers are removed from the tree, they will cause a tree sync.
@@ skipping 456 matching lines @@
               << "Flags: " << contents_opaque << ", " << layer_opaque << ", "
               << host_opaque << "\n";
         }
       }
     }
   }
 }
 
 }  // namespace
 }  // namespace cc