Removes aura dependencies from WindowPositioner

ui/platform_window/win/win_window.cc

 // Copyright 2014 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/platform_window/win/win_window.h"
 
 #include <memory>
 
 #include "base/strings/string16.h"
 #include "ui/events/event.h"
@@ skipping 24 matching lines @@
   window_bounds.set_y(std::max(0, window_bounds.y()));
   return window_bounds;
 }
 
 }  // namespace
 
 WinWindow::WinWindow(PlatformWindowDelegate* delegate,
                      const gfx::Rect& bounds)
     : delegate_(delegate) {
   CHECK(delegate_);
-  if (use_popup_as_root_window_for_test)
+  DWORD window_style = WS_OVERLAPPEDWINDOW;
+  if (use_popup_as_root_window_for_test) {
     set_window_style(WS_POPUP);
-  gfx::Rect window_bounds = GetWindowBoundsForClientBounds(
-      WS_OVERLAPPEDWINDOW, window_ex_style(), bounds);
+    window_style = WS_POPUP;
+  }
+  gfx::Rect window_bounds =
+      GetWindowBoundsForClientBounds(window_style, window_ex_style(), bounds);
   gfx::WindowImpl::Init(NULL, window_bounds);
   SetWindowText(hwnd(), L"WinWindow");
 }
 
 WinWindow::~WinWindow() {
 }
 
 void WinWindow::Destroy() {
   if (IsWindow(hwnd()))
     DestroyWindow(hwnd());
@@ skipping 133 matching lines @@
 
 namespace test {
 
 // static
 void SetUsePopupAsRootWindowForTest(bool use) {
   use_popup_as_root_window_for_test = use;
 }
 
 }  // namespace test
 }  // namespace ui