Added CommandBufferClient, CommandBufferStub and some IPC messages....

chrome/common/command_buffer_messages_internal.h

+// Copyright (c) 2009 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.
+
+#include "base/shared_memory.h"
+#include "ipc/ipc_message_macros.h"
+
+IPC_BEGIN_MESSAGES(CommandBuffer)
+  // Initialize a command buffer with the given number of command entries.
+  // Returns the shared memory handle for the command buffer mapped to the
+  // calling process.
+  IPC_SYNC_MESSAGE_ROUTED1_1(CommandBufferMsg_Initialize,
+                             int32 /* size */,
+                             base::SharedMemoryHandle /* ring_buffer */)
+
+  // Get the number of command entries in the command buffer.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_GetSize,
+                             int32 /* size */)
+
+  // Synchronize the put and get offsets of both processes. Caller passes its
+  // current put offset. Current get offset is returned.
+  IPC_SYNC_MESSAGE_ROUTED1_1(CommandBufferMsg_SyncOffsets,
+                             int32 /* put_offset */,
+                             int32 /* get_offset */)
+
+  // Get the current get offset.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_GetGetOffset,
+                             int32 /* get_offset */)
+
+  // Get the current put offset.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_GetPutOffset,
+                             int32 /* put_offset */)
+
+  // Create a shared memory transfer buffer. Returns an id that can be used to
+  // identify the transfer buffer from a comment.
+  IPC_SYNC_MESSAGE_ROUTED1_1(CommandBufferMsg_CreateTransferBuffer,
+                             int32 /* size */,
+                             int32 /* id */)
+
+  // Destroy a previously created transfer buffer.
+  IPC_SYNC_MESSAGE_ROUTED1_0(CommandBufferMsg_DestroyTransferBuffer,
+                             int32 /* id */)
+
+  // Get the shared memory handle for a transfer buffer mapped to the callers
+  // process.
+  IPC_SYNC_MESSAGE_ROUTED1_1(CommandBufferMsg_GetTransferBuffer,
+                             int32 /* id */,
+                             base::SharedMemoryHandle /* transfer_buffer */)
+
+  // Get the most recently processed token. Used for implementing fences.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_GetToken,
+                             int32 /* token */)
+
+  // Get the current parse error. Calling this resets the parse error if it is
+  // recoverable.
+  // TODO(apatrick): Switch to the parse_error::ParseError enum now that NPAPI
+  //    no longer limits to restricted set of datatypes.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_ResetParseError,
+                             int32 /* parse_error */)
+
+  // Get the current error status.
+  IPC_SYNC_MESSAGE_ROUTED0_1(CommandBufferMsg_GetErrorStatus,
+                             bool /* status */)
+
+IPC_END_MESSAGES(CommandBuffer)