Optimization: avoid making 4 JNI calls to get touch device attributes.

ui/base/touch/touch_device.cc

 // Copyright (c) 2013 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.
 
 #include "ui/base/touch/touch_device.h"
 
 namespace ui {
 
 // Platforms supporting touch link in an alternate implementation of this
 // method.
 TouchScreensAvailability GetTouchScreensAvailability() {
   return TouchScreensAvailability::NONE;
 }
 
 int MaxTouchPoints() {
   return 0;
 }
 
-int GetAvailablePointerTypes() {
+std::pair<int, int> GetAvailablePointerAndHoverTypes() {
+  // Assume a non-touch-device with a mouse
+  return std::make_pair(POINTER_TYPE_FINE, HOVER_TYPE_HOVER);
+}
+
+PointerType GetPrimaryPointerType(int available_pointer_types) {
   // Assume a non-touch-device with a mouse
   return POINTER_TYPE_FINE;
 }
 
-PointerType GetPrimaryPointerType() {
-  // Assume a non-touch-device with a mouse
-  return POINTER_TYPE_FINE;
-}
-
-int GetAvailableHoverTypes() {
+HoverType GetPrimaryHoverType(int available_hover_types) {
   // Assume a non-touch-device with a mouse
   return HOVER_TYPE_HOVER;
 }
-
-HoverType GetPrimaryHoverType() {
-  // Assume a non-touch-device with a mouse
-  return HOVER_TYPE_HOVER;
-}
 
 }  // namespace ui