Refactor validation code so it can be modified at runtime....

gpu/command_buffer/service/gles2_cmd_validation.h

Index: gpu/command_buffer/service/gles2_cmd_validation.h
===================================================================
--- gpu/command_buffer/service/gles2_cmd_validation.h	(revision 49807)
+++ gpu/command_buffer/service/gles2_cmd_validation.h	(working copy)
@@ -7,12 +7,40 @@
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_VALIDATION_H_
 
+#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(const T* valid_values, int num_values) {
+    for (int ii = 0; ii < num_values; ++ii) {
+      AddValue(valid_values[ii]);
+    }
+  }
+
+  void AddValue(const T value) {
+    valid_values_.push_back(value);
+  }
+
+  bool IsValid(const T value) const {
+    return std::find(valid_values_.begin(), valid_values_.end(), value) !=
+           valid_values_.end();
+  }
+
+ private:
+  std::vector<T> valid_values_;
+};
+
+struct Validators {
+  Validators();
 #include "gpu/command_buffer/service/gles2_cmd_validation_autogen.h"
+};
 
 }  // namespace gles2
 }  // namespace gpu