Remove unused |context| from GetDefaultParent().

ui/aura/client/window_parenting_client.h

 // Copyright (c) 2013 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.
 
 #ifndef UI_AURA_CLIENT_WINDOW_PARENTING_CLIENT_H_
 #define UI_AURA_CLIENT_WINDOW_PARENTING_CLIENT_H_
 
 #include "ui/aura/aura_export.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace aura {
 class Window;
 namespace client {
 
 // Implementations of this object are used to help locate a default parent for
 // NULL-parented Windows.
 class AURA_EXPORT WindowParentingClient {
  public:
   virtual ~WindowParentingClient() {}
 
   // Called by the Window when it looks for a default parent. Returns the
-  // window that |window| should be added to instead. |context| provides a
-  // Window (generally a RootWindow) that can be used to determine which
-  // desktop type the default parent should be chosen from.  NOTE: this may
-  // have side effects. It should only be used when |window| is going to be
+  // window that |window| should be added to instead. NOTE: this may have
+  // side effects. It should only be used when |window| is going to be
   // immediately added.
   //
-  // TODO(erg): Remove |context|, and maybe after oshima's patch lands,
-  // |bounds|.
-  virtual Window* GetDefaultParent(Window* context,
-                                   Window* window,
-                                   const gfx::Rect& bounds) = 0;
+  // TODO(erg): Maybe after oshima's patch lands, remove |bounds|.

[sky, 2017/03/20 17:57:34]

Remove this comment as bounds is needed.

+  virtual Window* GetDefaultParent(Window* window, const gfx::Rect& bounds) = 0;
 };
 
 // Set/Get a window tree client for the RootWindow containing |window|. |window|
 // must not be NULL.
 AURA_EXPORT void SetWindowParentingClient(
     Window* window,
     WindowParentingClient* window_tree_client);
 WindowParentingClient* GetWindowParentingClient(Window* window);
 
 // Adds |window| to an appropriate parent by consulting an implementation of
 // WindowParentingClient attached at the root Window containing |context|. The
 // final
 // location may be a window hierarchy other than the one supplied via
 // |context|, which must not be NULL. |screen_bounds| may be empty.
 AURA_EXPORT void ParentWindowWithContext(Window* window,
                                          Window* context,
                                          const gfx::Rect& screen_bounds);
 
 }  // namespace client
 }  // namespace aura
 
 #endif  // UI_AURA_CLIENT_WINDOW_PARENTING_CLIENT_H_