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

base/id_type_unittest.cc

 // Copyright 2016 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 <limits>
 #include <map>
 #include <sstream>
 #include <string>
 #include <type_traits>
 #include <unordered_map>
 
-#include "content/common/id_type.h"
+#include "base/id_type.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace content {
+namespace base {
 
 namespace {
 
 class Foo;
 using FooId = IdType<Foo, int, 0>;
 
 class Bar;
 using BarId = IdType<Bar, int, 0>;
 
 class AnotherIdMarker;
@@ skipping 164 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(,
                         IdTypeSpecificValueTest,
                         ::testing::Values(std::numeric_limits<int>::min(),
                                           -1,
                                           0,
                                           1,
                                           123,
                                           std::numeric_limits<int>::max()));
 
-}  // namespace content
+}  // namespace base