Extend MotionEvent to have tool type and button state

ui/events/gesture_detection/mock_motion_event.cc

Index: ui/events/gesture_detection/mock_motion_event.cc
diff --git a/ui/events/gesture_detection/mock_motion_event.cc b/ui/events/gesture_detection/mock_motion_event.cc
index d6e0a91b5a1f9f39adff2eca69b8e41e417f67a0..609c1198769085db43fdc62681e964f980d08c92 100644
--- a/ui/events/gesture_detection/mock_motion_event.cc
+++ b/ui/events/gesture_detection/mock_motion_event.cc
@@ -140,6 +140,14 @@ float MockMotionEvent::GetHistoricalY(size_t pointer_index,
   return 0;
 }
 
+MotionEvent::ToolType MockMotionEvent::GetToolType(size_t pointer_index) const {
+  return MotionEvent::TOOL_TYPE_UNKNOWN;
+}
+
+int MockMotionEvent::GetButtonState() const {
+  return 0;
+}
+
 scoped_ptr<MotionEvent> MockMotionEvent::Clone() const {
   return scoped_ptr<MotionEvent>(new MockMotionEvent(*this));
 }