Support multi-button press for synthetic mouse events

content/common/input/synthetic_web_input_event_builders.cc

 // 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.
 
 #include "content/common/input/synthetic_web_input_event_builders.h"
 
 #include "base/logging.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ui/events/base_event_utils.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ skipping 19 matching lines @@
     int window_x,
     int window_y,
     int modifiers) {
   DCHECK(WebInputEvent::isMouseEventType(type));
   WebMouseEvent result(type, modifiers,
                        ui::EventTimeStampToSeconds(ui::EventTimeForNow()));
   result.x = window_x;
   result.y = window_y;
   result.windowX = window_x;
   result.windowY = window_y;
-
-  if (type == WebInputEvent::MouseDown || type == WebInputEvent::MouseUp)
-    result.button = WebMouseEvent::Button::Left;
-  else
-    result.button = WebMouseEvent::Button::NoButton;
-
+  result.setModifiers(modifiers);
+  result.pointerType = blink::WebPointerProperties::PointerType::Mouse;
   return result;
 }
 
 WebMouseWheelEvent SyntheticWebMouseWheelEventBuilder::Build(
     WebMouseWheelEvent::Phase phase) {
   WebMouseWheelEvent result(WebInputEvent::MouseWheel,
                             WebInputEvent::NoModifiers,
                             ui::EventTimeStampToSeconds(ui::EventTimeForNow()));
   result.phase = phase;
   return result;
@@ skipping 193 matching lines @@
 
 int SyntheticWebTouchEvent::FirstFreeIndex() {
   for (size_t i = 0; i < kTouchesLengthCap; ++i) {
     if (touches[i].state == WebTouchPoint::StateUndefined)
       return i;
   }
   return -1;
 }
 
 }  // namespace content