Pointer/hover media query support: platform-independent 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 << 0,
+  PointerTypeFirst = PointerTypeNone,

[jdduke (slow), 2014/11/11 15:59:30]

I think these comments are slightly out-of-date, and we'll still want to static
assert that they match the blink counterparts (also I think you're missing the
gyp/gn additions for the Java enum generation?).

[mustaq, 2014/11/11 17:23:52]

- Updated the comments.
- Removed the CPP-Java-enum directives completely. Will add them plus the build
rules in the other (follow-up, platform-specific) CL.
- Fixed enum naming style as per mkosiba's comment in the other CL.

+  PointerTypeCoarse = 1 << 1,
+  PointerTypeFine = 1 << 2,
+  PointerTypeLast = PointerTypeFine
+};
+
+// Bit field values indicating what kind of pointer types are available. These
+// enums must match content::HoverType enums.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.base
+// GENERATED_JAVA_PREFIX_TO_STRIP: HoverType
+enum HoverType {
+  HoverTypeNone = 1 << 0,
+  HoverTypeFirst = HoverTypeNone,
+  HoverTypeOnDemand = 1 << 1,
+  HoverTypeHover = 1 << 2,
+  HoverTypeLast = HoverTypeHover
+};
+
 #if defined(OS_ANDROID)
 bool RegisterTouchDeviceAndroid(JNIEnv* env);
 #endif
 
 }  // namespace ui
 
 #endif  // UI_BASE_TOUCH_TOUCH_DEVICE_H_