Remove Owner param to EventFilter's ctor.

ash/drag_drop/drag_drop_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/drag_drop/drag_drop_controller.h"
 
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "base/message_loop.h"
 #include "ui/aura/client/drag_drop_delegate.h"
@@ skipping 16 matching lines @@
 namespace {
 const gfx::Point kDragDropWidgetOffset(0, 0);
 const base::TimeDelta kDragDropAnimationDuration =
     base::TimeDelta::FromMilliseconds(250);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DragDropController, public:
 
 DragDropController::DragDropController()
-    : aura::EventFilter(RootWindow::GetInstance()),
-      drag_image_(NULL),
+    : drag_image_(NULL),
       drag_data_(NULL),
       drag_operation_(0),
       dragged_window_(NULL),
       drag_drop_in_progress_(false),
       should_block_during_drag_drop_(true) {
   Shell::GetInstance()->AddRootWindowEventFilter(this);
   aura::client::SetDragDropClient(this);
 }
 
 DragDropController::~DragDropController() {
@@ skipping 181 matching lines @@
   window->SetBounds(gfx::Rect(drag_start_location_, window->bounds().size()));
 }
 
 void DragDropController::Cleanup() {
   drag_data_ = NULL;
   drag_drop_in_progress_ = false;
 }
 
 }  // namespace internal
 }  // namespace ash