Remove TouchEvent interface, and rename TouchEventImpl to TouchEvent

ash/magnifier/magnification_controller.cc

Index: ash/magnifier/magnification_controller.cc
diff --git a/ash/magnifier/magnification_controller.cc b/ash/magnifier/magnification_controller.cc
index 22785d352137c178598050b8f5ccd024e81c6b56..4a84ef467d07e0a1069cfdb9b91c7db6513f8c65 100644
--- a/ash/magnifier/magnification_controller.cc
+++ b/ash/magnifier/magnification_controller.cc
@@ -104,7 +104,7 @@ class MagnificationControllerImpl : virtual public MagnificationController,
                                    ui::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus PreHandleTouchEvent(
       aura::Window* target,
-      ui::TouchEventImpl* event) OVERRIDE;
+      ui::TouchEvent* event) OVERRIDE;
   virtual ui::GestureStatus PreHandleGestureEvent(
       aura::Window* target,
       ui::GestureEventImpl* event) OVERRIDE;
@@ -448,7 +448,7 @@ bool MagnificationControllerImpl::PreHandleMouseEvent(aura::Window* target,
 
 ui::TouchStatus MagnificationControllerImpl::PreHandleTouchEvent(
     aura::Window* target,
-    ui::TouchEventImpl* event) {
+    ui::TouchEvent* event) {
   return ui::TOUCH_STATUS_UNKNOWN;
 }