Pointer/hover media query support: platform-dependent changes

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"
 
 #if defined(OS_ANDROID)
 #include <jni.h>
 #endif
 
 
 namespace ui {
 
 // 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();
 
+// Bit field values indicating what kind of pointer types are available. These
+// enum must match content::PointerType enums.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.base
+// GENERATED_JAVA_PREFIX_TO_STRIP: PointerType
+enum PointerType {
+  PointerTypeNone = 1,

[mkosiba (inactive), 2014/11/10 22:00:13]

nit: Though the Google C++ Style Guide now says to use kConstantNaming for
enums, Chromium was written using MACRO_STYLE naming.  Continue to use this
style for consistency.
http://www.chromium.org/developers/coding-style

[mustaq, 2014/11/26 16:28:45]

Done.

+  PointerTypeCoarse = 2,
+  PointerTypeFine = 4
+};
+
+// Bit field values indicating what kind of pointer types are available. These
+// enums must match content::HoverType enums.
+enum HoverType {
+  HoverTypeNone = 1,
+  HoverTypeOnDemand = 2,
+  HoverTypeHover = 4
+};
+
+UI_BASE_EXPORT int AvailablePointerTypes();
+UI_BASE_EXPORT PointerType PrimaryPointerType();
+UI_BASE_EXPORT int AvailableHoverTypes();
+UI_BASE_EXPORT HoverType PrimaryHoverType();
+
 #if defined(OS_ANDROID)
 bool RegisterTouchDeviceAndroid(JNIEnv* env);
 #endif
 
 }  // namespace ui
 
 #endif  // UI_BASE_TOUCH_TOUCH_DEVICE_H_