Replacing WM_TOUCH with WM_POINTER for touch events on Wins 8+

ui/base/test/ui_controls.h

 // Copyright 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.
 
 #ifndef UI_BASE_TEST_UI_CONTROLS_H_
 #define UI_BASE_TEST_UI_CONTROLS_H_
 
 #include "base/callback_forward.h"
 #include "build/build_config.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 62 matching lines @@
   MIDDLE,
   RIGHT,
 };
 
 // Used to indicate the state of the button when generating events.
 enum MouseButtonState {
   UP = 1,
   DOWN = 2
 };
 
+enum TouchType { PRESS = 1 << 0, RELEASE = 1 << 1, MOVE = 1 << 2 };
+
 // Sends a mouse down and/or up message. The click will be sent to wherever
 // the cursor currently is, so be sure to move the cursor before calling this
 // (and be sure the cursor has arrived!).
 bool SendMouseEvents(MouseButton type, int state);
 bool SendMouseEventsNotifyWhenDone(MouseButton type,
                                    int state,
                                    const base::Closure& task);
 
 // Same as SendMouseEvents with UP | DOWN.
 bool SendMouseClick(MouseButton type);
 
+// Send WM_POINTER messages to generate touch events. There is no way to detect
+// when events are received by chrome, it's up to users of this API to detect
+// when events arrive. |action| is a bitmask of the TouchType constants that
+// indicate what events are generated, |num| is the number of the touch
+// pointers, |x| and |y| are the coordinates of the touch pointers.

[sky, 2017/06/27 02:19:47]

in screen coordinates, right?

[lanwei, 2017/06/27 18:55:42]

Yes, they are in screen coordinates.

+bool SendTouchEvents(int action, int num, int x, int y);

[sky, 2017/06/27 02:19:47]

I believe you've only implemented this for windows, which is fine. Please put
this in an ifdef windows to make that obvious.

[lanwei, 2017/06/27 18:55:42]

Done.

+
 #if defined(TOOLKIT_VIEWS)
 // Runs |closure| after processing all pending ui events.
 void RunClosureAfterAllPendingUIEvents(const base::Closure& closure);
 #endif
 
 #if defined(USE_AURA)
 class UIControlsAura;
 void InstallUIControlsAura(UIControlsAura* instance);
 #endif
 
 #if defined(OS_MACOSX)
 // Returns true when tests need to use extra Tab and Shift-Tab key events
 // to traverse to the desired item; because the application is configured to
 // traverse more elements for accessibility reasons.
 bool IsFullKeyboardAccessEnabled();
 #endif
 
 }  // namespace ui_controls
 
 #endif  // UI_BASE_TEST_UI_CONTROLS_H_