Remove WebScroll*

sky/viewer/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.
 
 component("cc") {
   output_name = "sky_viewer_cc"
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//gpu",
     "//skia",
     "//sky/engine/public:blink",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   defines = [ "SKY_VIEWER_CC_IMPLEMENTATION" ]
 
   forward_dependent_configs_from = [ "//skia" ]
 
   sources = [
     "sky_viewer_cc_export.h",
-    "scrollbar_impl.cc",
-    "scrollbar_impl.h",
     "web_animation_curve_common.cc",
     "web_animation_curve_common.h",
     "web_animation_impl.cc",
     "web_animation_impl.h",
     "web_compositor_support_impl.cc",
     "web_compositor_support_impl.h",
     "web_content_layer_impl.cc",
     "web_content_layer_impl.h",
     "web_external_bitmap_impl.cc",
     "web_external_bitmap_impl.h",
     "web_external_texture_layer_impl.cc",
     "web_external_texture_layer_impl.h",
     "web_filter_animation_curve_impl.cc",
     "web_filter_animation_curve_impl.h",
     "web_filter_operations_impl.cc",
     "web_filter_operations_impl.h",
     "web_float_animation_curve_impl.cc",
     "web_float_animation_curve_impl.h",
     "web_image_layer_impl.cc",
     "web_image_layer_impl.h",
     "web_layer_impl.cc",
     "web_layer_impl.h",
     "web_layer_impl_fixed_bounds.cc",
     "web_layer_impl_fixed_bounds.h",
-    "web_scroll_offset_animation_curve_impl.cc",
-    "web_scroll_offset_animation_curve_impl.h",
-    "web_scrollbar_layer_impl.cc",
-    "web_scrollbar_layer_impl.h",
     "web_to_cc_animation_delegate_adapter.cc",
     "web_to_cc_animation_delegate_adapter.h",
     "web_transform_animation_curve_impl.cc",
     "web_transform_animation_curve_impl.h",
     "web_transform_operations_impl.cc",
     "web_transform_operations_impl.h",
   ]
 }
 
 test("sky_viewer_cc_unittests") {
   deps = [
     ":cc",
     "//base/test:run_all_unittests",
     "//base/third_party/dynamic_annotations",
     "//skia",
     "//testing/gtest",
     "//ui/gfx/geometry",
     "//ui/gfx:test_support",
     "//cc",
     "//cc:test_support",
     "//sky/engine/public:sky_headers",
   ]
 
   sources = [
     "web_animation_unittest.cc",
     "web_float_animation_curve_unittest.cc",
     "web_layer_impl_fixed_bounds_unittest.cc",
   ]
 }