Emulate Android joystick scroll with synthetic mouse wheel event

content/browser/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/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
@@ skipping 1694 matching lines @@
       "android/java/gin_java_script_to_java_types_coercion.cc",
       "android/java/gin_java_script_to_java_types_coercion.h",
       "android/java/java_bridge_thread.cc",
       "android/java/java_bridge_thread.h",
       "android/java/java_method.cc",
       "android/java/java_method.h",
       "android/java/java_type.cc",
       "android/java/java_type.h",
       "android/java/jni_helper.cc",
       "android/java/jni_helper.h",
+      "android/joystick_scroll_provider.cc",
+      "android/joystick_scroll_provider.h",
       "android/load_url_params.cc",
       "android/load_url_params.h",
       "android/overscroll_controller_android.cc",
       "android/overscroll_controller_android.h",
       "android/synchronous_compositor_browser_filter.cc",
       "android/synchronous_compositor_browser_filter.h",
       "android/synchronous_compositor_host.cc",
       "android/synchronous_compositor_host.h",
       "android/tracing_controller_android.cc",
       "android/tracing_controller_android.h",
@@ skipping 244 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }