Add a MotionEventGeneric implementation

content/browser/renderer_host/input/motion_event_web.h

Index: content/browser/renderer_host/input/motion_event_web.h
diff --git a/content/browser/renderer_host/input/motion_event_web.h b/content/browser/renderer_host/input/motion_event_web.h
index 06a2141e7d4401bd14f300a6e84dec02c161d0b9..527e7672ef94686fe24f0f747db2235032810568 100644
--- a/content/browser/renderer_host/input/motion_event_web.h
+++ b/content/browser/renderer_host/input/motion_event_web.h
@@ -29,18 +29,6 @@ class MotionEventWeb : public ui::MotionEvent {
   virtual float GetTouchMajor(size_t pointer_index) const OVERRIDE;
   virtual float GetPressure(size_t pointer_index) const OVERRIDE;
   virtual base::TimeTicks GetEventTime() const OVERRIDE;
-  virtual size_t GetHistorySize() const OVERRIDE;
-  virtual base::TimeTicks GetHistoricalEventTime(
-      size_t historical_index) const OVERRIDE;
-  virtual float GetHistoricalTouchMajor(
-      size_t pointer_index,
-      size_t historical_index) const OVERRIDE;
-  virtual float GetHistoricalX(
-      size_t pointer_index,
-      size_t historical_index) const OVERRIDE;
-  virtual float GetHistoricalY(
-      size_t pointer_index,
-      size_t historical_index) const OVERRIDE;
   virtual ToolType GetToolType(size_t pointer_index) const OVERRIDE;
   virtual int GetButtonState() const OVERRIDE;
   virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE;