Make sure that the pressure is always 0 for pointerup events

ui/events/android/motion_event_android.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 "ui/events/android/motion_event_android.h"
 
 #include <android/input.h>
 
 #include <cmath>
 
@@ skipping 211 matching lines @@
 
 uint32_t MotionEventAndroid::GetUniqueEventId() const {
   return unique_event_id_;
 }
 
 MotionEventAndroid::Action MotionEventAndroid::GetAction() const {
   return cached_action_;
 }
 
 int MotionEventAndroid::GetActionIndex() const {
-  DCHECK(cached_action_ == ACTION_POINTER_UP ||
-         cached_action_ == ACTION_POINTER_DOWN)
+  DCHECK(cached_action_ == MotionEvent::ACTION_POINTER_UP ||
+         cached_action_ == MotionEvent::ACTION_POINTER_DOWN)
       << "Invalid action for GetActionIndex(): " << cached_action_;
   DCHECK_GE(cached_action_index_, 0);
   DCHECK_LT(cached_action_index_, static_cast<int>(cached_pointer_count_));
   return cached_action_index_;
 }
 
 size_t MotionEventAndroid::GetPointerCount() const {
   return cached_pointer_count_;
 }
 
@@ skipping 53 matching lines @@
       AttachCurrentThread(), event_, pointer_index));
 }
 
 float MotionEventAndroid::GetPressure(size_t pointer_index) const {
   DCHECK_LT(pointer_index, cached_pointer_count_);
   // Note that this early return is a special case exercised only in testing, as
   // caching the pressure values is not a worthwhile optimization (they're
   // accessed at most once per event instance).
   if (!event_.obj())
     return 0.f;
+  if (cached_action_ == MotionEvent::ACTION_UP)
+    return 0.f;
   return Java_MotionEvent_getPressureF_I(AttachCurrentThread(), event_,
                                          pointer_index);
 }
 
 float MotionEventAndroid::GetTilt(size_t pointer_index) const {
   DCHECK_LT(pointer_index, cached_pointer_count_);
   if (pointer_index < MAX_POINTERS_TO_CACHE)
     return cached_pointers_[pointer_index].tilt;
   if (!event_.obj())
     return 0.f;
@@ skipping 63 matching lines @@
       gfx::PointF(ToDips(pointer.pos_x_pixels), ToDips(pointer.pos_y_pixels));
   result.touch_major = ToDips(pointer.touch_major_pixels);
   result.touch_minor = ToDips(pointer.touch_minor_pixels);
   result.orientation = ToValidFloat(pointer.orientation_rad);
   result.tilt = ToValidFloat(pointer.tilt_rad);
   result.tool_type = FromAndroidToolType(pointer.tool_type);
   return result;
 }
 
 }  // namespace content