Improve scroll performance on Windows 10 with high precision touchpads.

ui/gfx/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("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 197 matching lines @@
     "text_utils_ios.mm",
     "transform.cc",
     "transform.h",
     "transform_util.cc",
     "transform_util.h",
     "ui_gfx_exports.cc",
     "utf16_indexing.cc",
     "utf16_indexing.h",
     "vector_icons_public.h",
     "vsync_provider.h",
+    "win/direct_manipulation.cc",
+    "win/direct_manipulation.h",
     "win/direct_write.cc",
     "win/direct_write.h",
     "win/dpi.cc",
     "win/dpi.h",
     "win/hwnd_util.cc",
     "win/hwnd_util.h",
     "win/metro_mode.cc",
     "win/metro_mode.h",
     "win/scoped_set_map_mode.h",
     "win/singleton_hwnd.cc",
@@ skipping 374 matching lines @@
 if (is_android) {
   generate_jni("gfx_jni_headers") {
     sources = [
       "../android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
       "../android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
       "../android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
     ]
     jni_package = "gfx"
   }
 }