Switch to standard integer types in ppapi/.

ppapi/cpp/private/flash_device_id.h

 // 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.
 
 #ifndef PPAPI_CPP_PRIVATE_FLASH_DEVICE_ID_H_
 #define PPAPI_CPP_PRIVATE_FLASH_DEVICE_ID_H_
 
+#include <stdint.h>
+
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/resource.h"
 
 namespace pp {
 namespace flash {
 
 class DeviceID : public Resource {
  public:
   DeviceID();
   DeviceID(const InstanceHandle& instance);
 
   // On success, returns a string var.
   int32_t GetDeviceID(const CompletionCallbackWithOutput<Var>& callback);
 };
 
 }  // namespace flash
 }  // namespace pp
 
 #endif  // PPAPI_CPP_PRIVATE_FLASH_DEVICE_ID_H_