Use base::WindowImpl instead of CWindowImpl to reduce dependencies on ATL....

base/window_impl.cc

 // Copyright (c) 2009 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 <list>
 
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "base/window_impl.h"
 #include "base/win_util.h"
@@ skipping 108 matching lines @@
   if (window_style_ == 0)
     window_style_ = parent ? kWindowDefaultChildStyle : kWindowDefaultStyle;
 
   // Ensures the parent we have been passed is valid, otherwise CreateWindowEx
   // will fail.
   if (parent && !::IsWindow(parent)) {
     NOTREACHED() << "invalid parent window specified.";
     parent = NULL;
   }
 
+  int x, y, width, height;
+  if (bounds.IsEmpty()) {
+    x = y = width = height = CW_USEDEFAULT;
+  } else {
+    x = bounds.x();
+    y = bounds.y();
+    width = bounds.width();
+    height = bounds.height();
+  }
+
   hwnd_ = CreateWindowEx(window_ex_style_, GetWindowClassName().c_str(), L"",
-                         window_style_, bounds.x(), bounds.y(), bounds.width(),
-                         bounds.height(), parent, NULL, NULL, this);
+                         window_style_, x, y, width, height,
+                         parent, NULL, NULL, this);
   DCHECK(hwnd_);
 
   // The window procedure should have set the data for us.
   DCHECK(win_util::GetWindowUserData(hwnd_) == this);
 }
 
 gfx::NativeView WindowImpl::GetNativeView() const {
   return hwnd_;
 }
 
@@ skipping 62 matching lines @@
   class_ex.hIconSm = class_ex.hIcon;
   ATOM atom = RegisterClassEx(&class_ex);
   DCHECK(atom);
 
   Singleton<ClassRegistrar>()->RegisterClass(class_info, name, atom);
 
   return name;
 }
 
 }  // namespace base