Add a mechanism for command buffer to conditionally allow ES3 enums.

gpu/command_buffer/service/gles2_cmd_validation.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.
 
 // Contains various validation functions for the GLES2 service.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_
 
 #include <algorithm>
 #include <vector>
 #define GLES2_GPU_SERVICE 1
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 
 namespace gpu {
 namespace gles2 {
 
 // ValueValidator returns true if a value is valid.
 template <typename T>
 class ValueValidator {
  public:
   ValueValidator() {}
 
   ValueValidator(const T* valid_values, int num_values) {
-    for (int ii = 0; ii < num_values; ++ii) {
-      AddValue(valid_values[ii]);
-    }
+    AddValues(valid_values, num_values);
   }
 
   void AddValue(const T value) {
     if (!IsValid(value)) {
       valid_values_.push_back(value);
     }
   }
 
+  void AddValues(const T* valid_values, int num_values) {
+    for (int ii = 0; ii < num_values; ++ii) {
+      AddValue(valid_values[ii]);
+    }
+  }
+
   bool IsValid(const T value) const {
     return std::find(valid_values_.begin(), valid_values_.end(), value) !=
            valid_values_.end();
   }
 
   const std::vector<T>& GetValues() const {
     return valid_values_;
   }
 
  private:
   std::vector<T> valid_values_;
 };
 
 struct Validators {
   Validators();
+
+  void AddES3Values();
+
 #include "gpu/command_buffer/service/gles2_cmd_validation_autogen.h"
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_