Allow deleted resources to be used

gpu/command_buffer/service/buffer_manager.h

 // Copyright (c) 2011 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_BUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_
 
 #include <map>
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
@@ skipping 97 matching lines @@
       DCHECK_EQ(target_, 0u);  // you can only set this once.
       target_ = target;
     }
 
     bool shadowed() const {
       return shadowed_;
     }
 
     void MarkAsDeleted() {
       service_id_ = 0;
-      shadow_.reset();
-      ClearCache();
     }
 
     void SetInfo(GLsizeiptr size, GLenum usage, bool shadow);
 
     // Clears any cache of index ranges.
     void ClearCache();
 
     // Service side buffer id.
     GLuint service_id_;
 
@@ skipping 56 matching lines @@
   // Whether or not buffers can be bound to multiple targets.
   bool allow_buffers_on_multiple_targets_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_BUFFER_MANAGER_H_