Implement position: sticky updates on compositor

cc/cc.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 183 matching lines @@
         'layers/layer_impl.h',
         "layers/layer_impl_test_properties.cc",
         "layers/layer_impl_test_properties.h",
         'layers/layer_iterator.h',
         'layers/layer_list_iterator.cc',
         'layers/layer_list_iterator.h',
         'layers/layer_position_constraint.cc',
         'layers/layer_position_constraint.h',
         'layers/layer_proto_converter.cc',
         'layers/layer_proto_converter.h',
+        'layers/layer_sticky_position_constraint.cc',
+        'layers/layer_sticky_position_constraint.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 507 matching lines @@
         'surfaces/surface_resource_holder.h',
         'surfaces/surface_sequence.h',
         'surfaces/surfaces_export.h',
       ],
       'includes': [
         '../build/android/increase_size_for_speed.gypi',
       ],
     },
   ],
 }