|  | // 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. | 
|  |  | 
|  | #ifndef UI_COMPOSITOR_COMPOSITOR_CONSTANTS_H_ | 
|  | #define UI_COMPOSITOR_COMPOSITOR_CONSTANTS_H_ | 
|  |  | 
|  | // This flag is used to work around a rendering bug in Windows where the | 
|  | // software surface becomes inconsistent with the hardware surface. This | 
|  | // happens in particular circumstances (Classic mode, Chrome using hardware | 
|  | // rendering, and the window on a secondary monitor) and when moving the mouse | 
|  | // over the window, Windows restores the GDI software surface underneath the | 
|  | // mouse, rather than the hardware surface we've painted. As a result, for | 
|  | // small or infrequently painting windows, we force back to the software | 
|  | // compositor to avoid this bug. See http://crbug.com/333380. | 
|  | const wchar_t kForceSoftwareCompositor[] = L"Chrome.ForceSoftwareCompositor"; | 
|  |  | 
|  | #endif  // UI_COMPOSITOR_COMPOSITOR_CONSTANTS_H_ |