Add basic GL functionality to the passthrough command buffer.

gpu/command_buffer/service/gl_utils.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.
 
 // This file includes all the necessary GL headers and implements some useful
 // utilities.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_
 
@@ skipping 34 matching lines @@
                                 GLenum precision_type,
                                 GLint* range,
                                 GLint* precision);
 
 // Using the provided feature info, query the numeric limits of the underlying
 // GL and fill in the members of the Capabilities struct.  Does not perform any
 // extension checks.
 void PopulateNumericCapabilities(Capabilities* caps,
                                  const FeatureInfo* feature_info);
 
+bool CheckUniqueAndNonNullIds(GLsizei n, const GLuint* client_ids);
+
 } // gles2
 } // gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GL_UTILS_H_