Switch to standard integer types in tools/.

tools/gn/value_unittest.cc

Index: tools/gn/value_unittest.cc
diff --git a/tools/gn/value_unittest.cc b/tools/gn/value_unittest.cc
index f934e6601812ec48e3caf8b6c8592a83bd3de12f..75f9f607097132147acdaf1f0be27c8779e3a2a6 100644
--- a/tools/gn/value_unittest.cc
+++ b/tools/gn/value_unittest.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <stdint.h>
+
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/test_with_scope.h"
 #include "tools/gn/value.h"
@@ -23,7 +25,7 @@ TEST(Value, ToString) {
   listval.list_value().push_back(Value(nullptr, "hi\"me"));
   listval.list_value().push_back(Value(nullptr, true));
   listval.list_value().push_back(Value(nullptr, false));
-  listval.list_value().push_back(Value(nullptr, static_cast<int64>(42)));
+  listval.list_value().push_back(Value(nullptr, static_cast<int64_t>(42)));
   // Printing lists always causes embedded strings to be quoted (ignoring the
   // quote flag), or else they wouldn't make much sense.
   EXPECT_EQ("[\"hi\\\"me\", true, false, 42]", listval.ToString(false));
@@ -35,7 +37,7 @@ TEST(Value, ToString) {
   Value scopeval(nullptr, scoped_ptr<Scope>(scope));
   EXPECT_EQ("{ }", scopeval.ToString(false));
 
-  scope->SetValue("a", Value(nullptr, static_cast<int64>(42)), nullptr);
+  scope->SetValue("a", Value(nullptr, static_cast<int64_t>(42)), nullptr);
   scope->SetValue("b", Value(nullptr, "hello, world"), nullptr);
   EXPECT_EQ("{\n  a = 42\n  b = \"hello, world\"\n}", scopeval.ToString(false));
 }