Move cc::LayerSettings to cc/layers/layer_settings.h.

cc/BUILD.gn

 # Copyright 2014 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.
 
 import("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
@@ skipping 122 matching lines @@
     "layers/layer.h",
     "layers/layer_client.h",
     "layers/layer_impl.cc",
     "layers/layer_impl.h",
     "layers/layer_iterator.h",
     "layers/layer_lists.h",
     "layers/layer_position_constraint.cc",
     "layers/layer_position_constraint.h",
     "layers/layer_proto_converter.cc",
     "layers/layer_proto_converter.h",
+    "layers/layer_settings.cc",
+    "layers/layer_settings.h",
     "layers/layer_utils.cc",
     "layers/layer_utils.h",
     "layers/nine_patch_layer.cc",
     "layers/nine_patch_layer.h",
     "layers/nine_patch_layer_impl.cc",
     "layers/nine_patch_layer_impl.h",
     "layers/paint_properties.h",
     "layers/painted_scrollbar_layer.cc",
     "layers/painted_scrollbar_layer.h",
     "layers/painted_scrollbar_layer_impl.cc",
@@ skipping 781 matching lines @@
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   if (is_android) {
     isolate_file = "cc_perftests.isolate"
   }
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.