Plumbing maxTouchPoints for Android.

ui/base/touch/touch_device.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_BASE_TOUCH_TOUCH_DEVICE_H_
 #define UI_BASE_TOUCH_TOUCH_DEVICE_H_
 
 #include "ui/base/ui_base_export.h"
 
+#ifdef OS_ANDROID
+#include <jni.h>
+#endif
+
+
 namespace ui {
 
-// TODO(sblom): This is non-standard, and should be removed before
-// RuntimeEnabledFlags::PointerEventsMaxTouchPoints is marked stable.
-// Tracked by: http://crbug.com/308649
-const int kMaxTouchPointsUnknown = -1;
-
 // Returns true if a touch device is available.
 UI_BASE_EXPORT bool IsTouchDevicePresent();
 
 // Returns the maximum number of simultaneous touch contacts supported
 // by the device. In the case of devices with multiple digitizers (e.g.
 // multiple touchscreens), the value MUST be the maximum of the set of
 // maximum supported contacts by each individual digitizer.
 // For example, suppose a device has 3 touchscreens, which support 2, 5,
 // and 10 simultaneous touch contacts, respectively. This returns 10.
 // http://www.w3.org/TR/pointerevents/#widl-Navigator-maxTouchPoints
 UI_BASE_EXPORT int MaxTouchPoints();
 
+#ifdef OS_ANDROID
+bool RegisterTouchDeviceAndroid(JNIEnv* env);
+#endif
+
 }  // namespace ui
 
 #endif  // UI_BASE_TOUCH_TOUCH_DEVICE_H_