sky-scrollable should use a reasonable fling curve

sky/engine/public/platform/WebInputEvent.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 142 matching lines @@
         // flag is set, the sender guarantees that no more input events will be
         // delivered until the next vsync and the receiver can schedule
         // rendering accordingly. If it isn't set, the receiver should not make
         // any assumptions about the delivery times of future input events
         // w.r.t. vsync.
         IsLastInputEventForCurrentVSync = 1 << 13,
     };
 
     static const int InputModifiers = ShiftKey | ControlKey | AltKey | MetaKey;
 
-    double timeStampSeconds; // Seconds since epoch.
+    double timeStampMS; // Milliseconds since epoch.
     unsigned size; // The size of this structure, for serialization.
     Type type;
     int modifiers;
 
     static bool isPointerEventType(int type)
     {
         return PointerTypeFirst <= type && type <= PointerTypeLast;
     }
 
     // Returns true if the WebInputEvent |type| is a keyboard event.
     static bool isKeyboardEventType(int type)
     {
         return KeyboardTypeFirst <= type && type <= KeyboardTypeLast;
     }
 
     // Returns true if the WebInputEvent is a gesture event.
     static bool isGestureEventType(int type)
     {
         return GestureTypeFirst <= type && type <= GestureTypeLast;
     }
 
 protected:
     explicit WebInputEvent(unsigned sizeParam)
     {
         memset(this, 0, sizeParam);
-        timeStampSeconds = 0.0;
+        timeStampMS = 0.0;
         size = sizeParam;
         type = Undefined;
         modifiers = 0;
     }
 };
 
 // WebPointerEvent ------------------------------------------------------------
 
 class WebPointerEvent : public WebInputEvent {
 public:
@@ skipping 127 matching lines @@
     {
         memset(&data, 0, sizeof(data));
     }
 };
 
 #pragma pack(pop)
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PUBLIC_PLATFORM_WEBINPUTEVENT_H_