Introducing gpu::CommandBufferId as a distinct, IdType<...>-based type.

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 12652 matching lines @@
   const gpu::CommandBufferNamespace kMinNamespaceId =
       gpu::CommandBufferNamespace::INVALID;
   const gpu::CommandBufferNamespace kMaxNamespaceId =
       gpu::CommandBufferNamespace::NUM_COMMAND_BUFFER_NAMESPACES;
 
   const gpu::CommandBufferNamespace namespace_id =
       ((c.namespace_id >= static_cast<int32_t>(kMinNamespaceId)) &&
        (c.namespace_id < static_cast<int32_t>(kMaxNamespaceId)))
           ? static_cast<gpu::CommandBufferNamespace>(c.namespace_id)
           : gpu::CommandBufferNamespace::INVALID;
-  const uint64_t command_buffer_id = c.command_buffer_id();
+  const CommandBufferId command_buffer_id =
+      CommandBufferId::FromUnsafeValue(c.command_buffer_id());
   const uint64_t release = c.release_count();
   if (wait_fence_sync_callback_.is_null())
     return error::kNoError;
 
   return wait_fence_sync_callback_.Run(namespace_id, command_buffer_id, release)
              ? error::kNoError
              : error::kDeferCommandUntilLater;
 }
 
 error::Error GLES2DecoderImpl::HandleDiscardBackbufferCHROMIUM(
@@ skipping 2970 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu