Move MotionEventAndroid to ui/events/android

ui/events/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/rules.gni")
+}
+
 static_library("dom_keycode_converter") {
   sources = [
     "keycodes/dom/dom_code.h",
     "keycodes/dom/dom_key.h",
     "keycodes/dom/dom_key_data.inc",
     "keycodes/dom/keycode_converter.cc",
     "keycodes/dom/keycode_converter.h",
     "keycodes/dom/keycode_converter_data.inc",
   ]
 
@@ skipping 156 matching lines @@
       "gestures/gesture_recognizer_impl.cc",
       "gestures/gesture_recognizer_impl.h",
       "gestures/motion_event_aura.cc",
       "gestures/motion_event_aura.h",
     ]
   }
 
   if (is_win || is_mac || use_x11 || use_ozone || (is_android && use_aura)) {
     sources -= [ "events_stub.cc" ]
   }
+
+  if (is_android) {
+    sources += [
+      "android/events_jni_registrar.cc",
+      "android/events_jni_registrar.h",
+      "android/motion_event_android.cc",
+      "android/motion_event_android.h",
+    ]
+    deps += [ ":motionevent_jni_headers" ]
+  }
 }
 
 component("gesture_detection") {
   sources = [
     "gesture_detection/bitset_32.h",
     "gesture_detection/filtered_gesture_provider.cc",
     "gesture_detection/filtered_gesture_provider.h",
     "gesture_detection/gesture_configuration.cc",
     "gesture_detection/gesture_configuration.h",
     "gesture_detection/gesture_detection_export.h",
@@ skipping 212 matching lines @@
       "//ui/events/ozone:events_ozone_layout",
     ]
   }
 
   if (use_aura) {
     sources += [
       "gestures/gesture_provider_aura_unittest.cc",
       "gestures/motion_event_aura_unittest.cc",
     ]
   }
+
+  if (is_android) {
+    sources += [ "android/motion_event_android_unittest.cc" ]
+  }
 }
+
+if (is_android) {
+  generate_jar_jni("motionevent_jni_headers") {
+    jni_package = "ui"
+    classes = [ "android/view/MotionEvent.class" ]
+  }
+}