Map ET_POINTER_MOVED to ET_MOUSE_DRAGGED when a mouse button is down.

ui/events/event_unittest.cc

 // 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.
 
 #include "ui/events/event.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 880 matching lines @@
   const struct {
     ui::EventType in_type;
     ui::EventType out_type;
     gfx::Point location;
     gfx::Point root_location;
     int flags;
   } kTestData[] = {
       {ui::ET_POINTER_DOWN, ui::ET_MOUSE_PRESSED, gfx::Point(10, 20),
        gfx::Point(110, 120), 0},
       {ui::ET_POINTER_MOVED, ui::ET_MOUSE_MOVED, gfx::Point(20, 10),
+       gfx::Point(1, 2), 0},
+      {ui::ET_POINTER_MOVED, ui::ET_MOUSE_DRAGGED, gfx::Point(20, 10),
        gfx::Point(1, 2), EF_LEFT_MOUSE_BUTTON},
+      {ui::ET_POINTER_MOVED, ui::ET_MOUSE_DRAGGED, gfx::Point(20, 10),
+       gfx::Point(1, 2), EF_RIGHT_MOUSE_BUTTON},
+      {ui::ET_POINTER_MOVED, ui::ET_MOUSE_DRAGGED, gfx::Point(20, 10),
+       gfx::Point(1, 2), EF_MIDDLE_MOUSE_BUTTON},
       {ui::ET_POINTER_ENTERED, ui::ET_MOUSE_ENTERED, gfx::Point(), gfx::Point(),
        EF_MIDDLE_MOUSE_BUTTON | EF_RIGHT_MOUSE_BUTTON},
       {ui::ET_POINTER_EXITED, ui::ET_MOUSE_EXITED, gfx::Point(5, 1),
        gfx::Point(1, 5), EF_RIGHT_MOUSE_BUTTON},
       {ui::ET_POINTER_UP, ui::ET_MOUSE_RELEASED, gfx::Point(1000, 1000),
        gfx::Point(14, 15), EF_MIDDLE_MOUSE_BUTTON}};
 
   for (size_t i = 0; i < arraysize(kTestData); i++) {
     ui::PointerEvent pointer_event(
         kTestData[i].in_type, ui::EventPointerType::POINTER_TYPE_MOUSE,
@@ skipping 86 matching lines @@
   button_event->type = ButtonPress;
   button_event->button = 4; // A valid wheel button number between min and max.
   MouseWheelEvent mouse_ev(&native_event);
 
   histogram_tester.ExpectTotalCount("Event.Latency.OS.MOUSE_WHEEL", 1);
 #endif
 }
 
 
 }  // namespace ui