Remove unused |context| from GetDefaultParent().

ui/views/widget/desktop_aura/desktop_native_widget_aura.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 "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 163 matching lines @@
   explicit DesktopNativeWidgetAuraWindowParentingClient(
       aura::Window* root_window)
       : root_window_(root_window) {
     aura::client::SetWindowParentingClient(root_window_, this);
   }
   ~DesktopNativeWidgetAuraWindowParentingClient() override {
     aura::client::SetWindowParentingClient(root_window_, NULL);
   }
 
   // Overridden from client::WindowParentingClient:
-  aura::Window* GetDefaultParent(aura::Window* context,
-                                 aura::Window* window,
+  aura::Window* GetDefaultParent(aura::Window* window,
                                  const gfx::Rect& bounds) override {
     bool is_fullscreen = window->GetProperty(aura::client::kShowStateKey) ==
         ui::SHOW_STATE_FULLSCREEN;
     bool is_menu = window->type() == ui::wm::WINDOW_TYPE_MENU;
 
     if (is_fullscreen || is_menu) {
       bool root_is_always_on_top = false;
       internal::NativeWidgetPrivate* native_widget =
           DesktopNativeWidgetAura::ForWindow(root_window_);
       if (native_widget)
@@ skipping 1012 matching lines @@
   if (cursor_reference_count_ == 0) {
     // We are the last DesktopNativeWidgetAura instance, and we are responsible
     // for cleaning up |cursor_manager_|.
     delete cursor_manager_;
     native_cursor_manager_ = NULL;
     cursor_manager_ = NULL;
   }
 }
 
 }  // namespace views