Added C++ wrappers for PPB_HostResolver_Private interface.

ppapi/cpp/private/host_resolver_private.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_HOST_RESOLVER_PRIVATE_H_
+#define PPAPI_CPP_PRIVATE_HOST_RESOLVER_PRIVATE_H_
+
+#include <string>
+
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/private/ppb_host_resolver_private.h"
+#include "ppapi/cpp/resource.h"
+#include "ppapi/cpp/var.h"
+
+struct PP_NetAddress_Private;
+
+namespace pp {
+
+class CompletionCallback;
+class InstanceHandle;
+
+class HostResolverPrivate : public Resource {
+ public:
+  explicit HostResolverPrivate(const InstanceHandle& instance);
+
+  // Returns true if the required interface is available.
+  static bool IsAvailable();
+
+  int32_t Resolve(const std::string& host,
+                  uint16_t port,
+                  const PP_HostResolver_Private_Hint& hint,
+                  const CompletionCallback& callback);
+  Var GetCanonicalName();
+  uint32_t GetSize();
+  bool GetNetAddress(uint32_t index, PP_NetAddress_Private* address);
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_PRIVATE_HOST_RESOLVER_PRIVATE_H_