Continue deleting code in ui/.

ui/base/win/hidden_window.cc

Index: ui/base/win/hidden_window.cc
diff --git a/ui/base/win/hidden_window.cc b/ui/base/win/hidden_window.cc
deleted file mode 100644
index d04f2a3f7fad918ad428103b7e181a30b34d4ed2..0000000000000000000000000000000000000000
--- a/ui/base/win/hidden_window.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// 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/base/win/hidden_window.h"
-
-#include "ui/gfx/win/window_impl.h"
-
-namespace ui {
-
-namespace {
-
-// We need to have a parent window for the compositing code to work correctly.
-//
-// A tab will not have a parent HWND whenever it is not active in its
-// host window - for example at creation time and when it's in the
-// background, so we provide a default widget to host them.
-//
-// It may be tempting to use GetDesktopWindow() instead, but this is
-// problematic as the shell sends messages to children of the desktop
-// window that interact poorly with us.
-//
-// See: http://crbug.com/16476
-class TempParent : public gfx::WindowImpl {
- public:
-  static TempParent* Get() {
-    static TempParent* g_temp_parent;
-    if (!g_temp_parent) {
-      g_temp_parent = new TempParent();
-
-      g_temp_parent->set_window_style(WS_POPUP);
-      g_temp_parent->set_window_ex_style(WS_EX_TOOLWINDOW);
-      g_temp_parent->Init(GetDesktopWindow(), gfx::Rect());
-      EnableWindow(g_temp_parent->hwnd(), FALSE);
-    }
-    return g_temp_parent;
-  }
-
- private:
-  // Explicitly do nothing in Close. We do this as some external apps may get a
-  // handle to this window and attempt to close it.
-  void OnClose() {
-  }
-
-  CR_BEGIN_MSG_MAP_EX(WebContentsViewWin)
-    CR_MSG_WM_CLOSE(OnClose)
-  CR_END_MSG_MAP()
-};
-
-}  // namespace
-
-HWND GetHiddenWindow() {
-  return TempParent::Get()->hwnd();
-}
-
-}  // namespace ui