Use typed integers for the ExecutionSerial

This will prevent mixing it up with other serial types in the future.

Bug: dawn:442
Change-Id: I74e964708acc62eb0f33127cc48f1b9a7b171d11
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28923
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>

src/common/BUILD.gn

@@ -172,7 +172,6 @@ if (is_win || is_linux || is_chromeos || is_mac || is_fuchsia || is_android) {
       "RefCounted.h",
       "Result.cpp",
       "Result.h",
-      "Serial.h",
       "SerialMap.h",
       "SerialQueue.h",
       "SerialStorage.h",

src/common/CMakeLists.txt

@@ -35,7 +35,6 @@ target_sources(dawn_common PRIVATE
     "RefCounted.h"
     "Result.cpp"
     "Result.h"
-    "Serial.h"
     "SerialMap.h"
     "SerialQueue.h"
     "SerialStorage.h"

src/common/Serial.h

@@ -1,22 +0,0 @@
-// Copyright 2017 The Dawn Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef COMMON_SERIAL_H_
-#define COMMON_SERIAL_H_
-
-#include <cstdint>
-
-using Serial = uint64_t;
-
-#endif  // COMMON_SERIAL_H_

src/common/SerialStorage.h

@@ -16,7 +16,6 @@
 #define COMMON_SERIALSTORAGE_H_
 
 #include "common/Assert.h"
-#include "common/Serial.h"
 
 #include <cstdint>
 #include <utility>