Remove GestureEvent interface, and rename GestureEventImpl to GestureEvent.

ui/aura/window_unittest.cc

Index: ui/aura/window_unittest.cc
diff --git a/ui/aura/window_unittest.cc b/ui/aura/window_unittest.cc
index afed3cdd1778691b6385bbffc01f39ed2fc19aa6..668abad81ab6901f1f82cf4c9890e46215912ea6 100644
--- a/ui/aura/window_unittest.cc
+++ b/ui/aura/window_unittest.cc
@@ -175,7 +175,7 @@ class CaptureWindowDelegateImpl : public TestWindowDelegate {
     return ui::TOUCH_STATUS_UNKNOWN;
   }
   virtual ui::GestureStatus OnGestureEvent(
-      ui::GestureEventImpl* event) OVERRIDE {
+      ui::GestureEvent* event) OVERRIDE {
     gesture_event_count_++;
     return ui::GESTURE_STATUS_UNKNOWN;
   }
@@ -218,7 +218,7 @@ class GestureTrackPositionDelegate : public TestWindowDelegate {
   GestureTrackPositionDelegate() {}
 
   virtual ui::GestureStatus OnGestureEvent(
-      ui::GestureEventImpl* event) OVERRIDE {
+      ui::GestureEvent* event) OVERRIDE {
     position_ = event->location();
     return ui::GESTURE_STATUS_CONSUMED;
   }