Arrange compositor scrolling into scroll customization format

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 90 matching lines @@
     "debug/unittest_only_benchmark_impl.cc",
     "debug/unittest_only_benchmark_impl.h",
     "input/input_handler.cc",
     "input/input_handler.h",
     "input/layer_selection_bound.cc",
     "input/layer_selection_bound.h",
     "input/page_scale_animation.cc",
     "input/page_scale_animation.h",
     "input/scroll_elasticity_helper.cc",
     "input/scroll_elasticity_helper.h",
+    "input/scroll_state.cc",
+    "input/scroll_state.h",
     "input/selection.h",
     "input/selection_bound_type.h",
     "input/top_controls_manager.cc",
     "input/top_controls_manager.h",
     "input/top_controls_manager_client.h",
     "layers/append_quads_data.h",
     "layers/content_layer_client.h",
     "layers/delegated_frame_provider.cc",
     "layers/delegated_frame_provider.h",
     "layers/delegated_frame_resource_collection.cc",
@@ skipping 602 matching lines @@
     "base/list_container_unittest.cc",
     "base/math_util_unittest.cc",
     "base/region_unittest.cc",
     "base/rolling_time_delta_history_unittest.cc",
     "base/scoped_ptr_vector_unittest.cc",
     "base/sidecar_list_container_unittest.cc",
     "base/simple_enclosed_region_unittest.cc",
     "base/tiling_data_unittest.cc",
     "debug/frame_timing_tracker_unittest.cc",
     "debug/micro_benchmark_controller_unittest.cc",
+    "input/scroll_state_unittest.cc",
     "input/top_controls_manager_unittest.cc",
     "layers/delegated_frame_provider_unittest.cc",
     "layers/delegated_frame_resource_collection_unittest.cc",
     "layers/delegated_renderer_layer_impl_unittest.cc",
     "layers/delegated_renderer_layer_unittest.cc",
     "layers/heads_up_display_layer_impl_unittest.cc",
     "layers/heads_up_display_unittest.cc",
     "layers/io_surface_layer_impl_unittest.cc",
     "layers/layer_impl_unittest.cc",
     "layers/layer_iterator_unittest.cc",
@@ skipping 169 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.