Fix missing fields in GestureScrollBegin/Update/End event conversions.

third_party/WebKit/Source/platform/PlatformGestureEvent.h

 /*
  * Copyright (C) 2011 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 81 matching lines @@
 
     const IntPoint& position() const { return m_position; } // PlatformWindow coordinates.
     const IntPoint& globalPosition() const { return m_globalPosition; } // Screen coordinates.
 
     const IntSize& area() const { return m_area; }
 
     PlatformGestureSource source() const { return m_source; }
 
     float deltaX() const
     {
-        ASSERT(m_type == PlatformEvent::GestureScrollUpdate);
+        ASSERT(m_type == PlatformEvent::GestureScrollBegin || m_type == PlatformEvent::GestureScrollUpdate);
         return m_data.m_scroll.m_deltaX;
     }
 
     float deltaY() const
     {
-        ASSERT(m_type == PlatformEvent::GestureScrollUpdate);
+        ASSERT(m_type == PlatformEvent::GestureScrollBegin || m_type == PlatformEvent::GestureScrollUpdate);
         return m_data.m_scroll.m_deltaY;
     }
 
     ScrollGranularity deltaUnits() const
     {
-        ASSERT(m_type == PlatformEvent::GestureScrollUpdate);
+        ASSERT(m_type == PlatformEvent::GestureScrollBegin || m_type == PlatformEvent::GestureScrollUpdate || m_type == PlatformEvent::GestureScrollEnd);
         return m_data.m_scroll.m_deltaUnits;
     }
 
     int tapCount() const
     {
         ASSERT(m_type == PlatformEvent::GestureTap);
         return m_data.m_tap.m_tapCount;
     }
 
     float velocityX() const
     {
         ASSERT(m_type == PlatformEvent::GestureScrollUpdate || m_type == PlatformEvent::GestureFlingStart);
         return m_data.m_scroll.m_velocityX;
     }
 
     float velocityY() const
     {
         ASSERT(m_type == PlatformEvent::GestureScrollUpdate || m_type == PlatformEvent::GestureFlingStart);
         return m_data.m_scroll.m_velocityY;
     }
 
     bool inertial() const
     {
-        ASSERT(m_type == PlatformEvent::GestureScrollUpdate || m_type == PlatformEvent::GestureScrollEnd);
+        ASSERT(m_type == PlatformEvent::GestureScrollBegin || m_type == PlatformEvent::GestureScrollUpdate || m_type == PlatformEvent::GestureScrollEnd);
         return m_data.m_scroll.m_inertial;
     }
 
+    bool synthetic() const
+    {
+        ASSERT(m_type == PlatformEvent::GestureScrollBegin || m_type == PlatformEvent::GestureScrollEnd);
+        return m_data.m_scroll.m_synthetic;
+    }
+
     int resendingPluginId() const
     {
         if (m_type == PlatformEvent::GestureScrollUpdate
             || m_type == PlatformEvent::GestureScrollBegin
             || m_type == PlatformEvent::GestureScrollEnd)
             return m_data.m_scroll.m_resendingPluginId;
 
         // This function is called by *all* gesture event types in
         // GestureEvent::Create(), so we return -1 for all other types.
         return -1;
@@ skipping 55 matching lines @@
     IntPoint m_globalPosition;
     IntSize m_area;
     PlatformGestureSource m_source;
 
     union {
         struct {
             int m_tapCount;
         } m_tap;
 
         struct {
+            // |m_deltaX| and |m_deltaY| represent deltas in GSU but
+            // are only hints in GSB.
             float m_deltaX;
             float m_deltaY;
             float m_velocityX;
             float m_velocityY;
             int m_preventPropagation;
             bool m_inertial;
             ScrollGranularity m_deltaUnits;
             int m_resendingPluginId;
+            bool m_synthetic;
         } m_scroll;
 
         struct {
             float m_scale;
         } m_pinchUpdate;
     } m_data;
 };
 
 } // namespace blink
 
 #endif // PlatformGestureEvent_h