Make sure that the pressure is always 0 for pointerup events

content/browser/renderer_host/input/touch_emulator.cc

 // Copyright 2014 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/browser/renderer_host/input/touch_emulator.h"
 
 #include "build/build_config.h"
 #include "content/browser/renderer_host/input/motion_event_web.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "content/grit/content_resources.h"
@@ skipping 443 matching lines @@
                    << mouse_event.type();
   }
   touch_event_.touchesLength = 1;
   touch_event_.setModifiers(ModifiersWithoutMouseButtons(mouse_event));
   WebTouchEventTraits::ResetTypeAndTouchStates(
       eventType, mouse_event.timeStampSeconds(), &touch_event_);
   WebTouchPoint& point = touch_event_.touches[0];
   point.id = 0;
   point.radiusX = 0.5f * cursor_size_.width();
   point.radiusY = 0.5f * cursor_size_.height();
-  point.force = 1.f;
+  point.force = eventType == WebInputEvent::TouchEnd ? 0.f : 1.f;
   point.rotationAngle = 0.f;
   point.position.x = mouse_event.x;
   point.screenPosition.x = mouse_event.globalX;
   point.position.y = mouse_event.y;
   point.screenPosition.y = mouse_event.globalY;
   point.tiltX = 0;
   point.tiltY = 0;
   point.pointerType = blink::WebPointerProperties::PointerType::Touch;
 }
 
 bool TouchEmulator::InPinchGestureMode() const {
   return shift_pressed_;
 }
 
 }  // namespace content