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diff --git a/chromium/gpu/command_buffer/service/cmd_parser.h b/chromium/gpu/command_buffer/service/cmd_parser.h
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+// 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 command parser class.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_
+
+#include "gpu/command_buffer/common/constants.h"
+#include "gpu/command_buffer/common/cmd_buffer_common.h"
+#include "gpu/gpu_export.h"
+
+namespace gpu {
+
+class AsyncAPIInterface;
+
+// Command parser class. This class parses commands from a shared memory
+// buffer, to implement some asynchronous RPC mechanism.
+class GPU_EXPORT CommandParser {
+ public:
+  explicit CommandParser(AsyncAPIInterface* handler);
+
+  // Sets the buffer to read commands from.
+  void SetBuffer(
+      void* shm_address,
+      size_t shm_size,
+      ptrdiff_t offset,
+      size_t size);
+
+  // Gets the "get" pointer. The get pointer is an index into the command
+  // buffer considered as an array of CommandBufferEntry.
+  CommandBufferOffset get() const { return get_; }
+
+  // Sets the "get" pointer. The get pointer is an index into the command buffer
+  // considered as an array of CommandBufferEntry.
+  bool set_get(CommandBufferOffset get) {
+    if (get >= 0 && get < entry_count_) {
+      get_ = get;
+      return true;
+    }
+    return false;
+  }
+
+  // Sets the "put" pointer. The put pointer is an index into the command
+  // buffer considered as an array of CommandBufferEntry.
+  void set_put(CommandBufferOffset put) { put_ = put; }
+
+  // Gets the "put" pointer. The put pointer is an index into the command
+  // buffer considered as an array of CommandBufferEntry.
+  CommandBufferOffset put() const { return put_; }
+
+  // Checks whether there are commands to process.
+  bool IsEmpty() const { return put_ == get_; }
+
+  // Processes one command, updating the get pointer. This will return an error
+  // if there are no commands in the buffer.
+  error::Error ProcessCommand();
+
+  // Processes all commands until get == put.
+  error::Error ProcessAllCommands();
+
+  // Reports an error.
+  void ReportError(unsigned int command_id, error::Error result);
+
+ private:
+  CommandBufferOffset get_;
+  CommandBufferOffset put_;
+  CommandBufferEntry* buffer_;
+  int32 entry_count_;
+  AsyncAPIInterface* handler_;
+  bool trace_gl_commands_;
+};
+
+// This class defines the interface for an asynchronous API handler, that
+// is responsible for de-multiplexing commands and their arguments.
+class AsyncAPIInterface {
+ public:
+  AsyncAPIInterface() {}
+  virtual ~AsyncAPIInterface() {}
+
+  // Executes a command.
+  // Parameters:
+  //    command: the command index.
+  //    arg_count: the number of CommandBufferEntry arguments.
+  //    cmd_data: the command data.
+  // Returns:
+  //   error::kNoError if no error was found, one of
+  //   error::Error otherwise.
+  virtual error::Error DoCommand(
+      unsigned int command,
+      unsigned int arg_count,
+      const void* cmd_data) = 0;
+
+  // Returns a name for a command. Useful for logging / debuging.
+  virtual const char* GetCommandName(unsigned int command_id) const = 0;
+};
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_SERVICE_CMD_PARSER_H_