Make invalidateFramebuffer no-op for DEPTH_STENCIL attachment

gpu/command_buffer/service/framebuffer_manager.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 68 matching lines @@
   Framebuffer(FramebufferManager* manager, GLuint service_id);
 
   GLuint service_id() const {
     return service_id_;
   }
 
   bool HasUnclearedAttachment(GLenum attachment) const;
   bool HasUnclearedColorAttachments() const;
 
   bool HasSRGBAttachments() const;
+  bool HasDepthStencilFormatAttachment(GLenum attachment) const;
 
   void ClearUnclearedIntOr3DTexturesOrPartiallyClearedTextures(
       GLES2Decoder* decoder,
       TextureManager* texture_manager);
 
   bool HasUnclearedIntRenderbufferAttachments() const;
 
   void ClearUnclearedIntRenderbufferAttachments(
     RenderbufferManager* renderbuffer_manager);
 
@@ skipping 278 matching lines @@
 
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_