Switch to standard integer types in ppapi/.

ppapi/proxy/serialized_var_unittest.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 <stdint.h>
+
 #include "ppapi/proxy/ppapi_proxy_test.h"
-
 #include "ppapi/proxy/proxy_object_var.h"
 #include "ppapi/proxy/serialized_var.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 PP_Var MakeObjectVar(int64_t object_id) {
@@ skipping 361 matching lines @@
   }
 
   // When the ReturnValue object goes out of scope, it should have sent a
   // release message to the browser.
   EXPECT_EQ(-1, var_tracker().GetRefCountForObject(plugin_object));
   EXPECT_EQ(1u, sink().message_count());
 }
 
 }  // namespace proxy
 }  // namespace ppapi