Make command buffer commands and immediate data volatile

gpu/command_buffer/service/gles2_cmd_decoder.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 contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <stdint.h>
@@ skipping 324 matching lines @@
 
  protected:
   GLES2Decoder();
 
   // Decode a command, and call the corresponding GL functions.
   // NOTE: DoCommand() is slower than calling DoCommands() on larger batches
   // of commands at once, and is now only used for tests that need to track
   // individual commands.
   error::Error DoCommand(unsigned int command,
                          unsigned int arg_count,
-                         const void* cmd_data) override;
+                         const volatile void* cmd_data) override;
 
  private:
   bool initialized_;
   bool debug_;
   bool log_commands_;
   bool unsafe_es3_apis_enabled_;
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_