Added C++ wrappers for PPB_HostResolver_Private interface.

ppapi/tests/test_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_TESTS_TEST_HOST_RESOLVER_PRIVATE_H_
 #define PPAPI_TESTS_TEST_HOST_RESOLVER_PRIVATE_H_
 
 #include <string>
 
-#include "ppapi/c/ppb_core.h"
-#include "ppapi/c/private/ppb_host_resolver_private.h"
 #include "ppapi/tests/test_case.h"
 
+struct PP_HostResolver_Private_Hint;
+struct PP_NetAddress_Private;
+
 namespace pp {
 
+class HostResolverPrivate;
 class TCPSocketPrivate;
 
 }  // namespace pp
 
 class TestHostResolverPrivate : public TestCase {
  public:
   explicit TestHostResolverPrivate(TestingInstance* instance);
 
   // TestCase implementation.
   virtual bool Init();
   virtual void RunTests(const std::string& filter);
 
  private:
   std::string SyncConnect(pp::TCPSocketPrivate* socket,
                           const std::string& host,
                           uint16_t port);
   std::string SyncConnect(pp::TCPSocketPrivate* socket,
                           const PP_NetAddress_Private& address);
   std::string SyncRead(pp::TCPSocketPrivate* socket,
                        char* buffer,
                        int32_t num_bytes,
                        int32_t* bytes_read);
   std::string SyncWrite(pp::TCPSocketPrivate* socket,
                         const char* buffer,
                         int32_t num_bytes,
                         int32_t* bytes_written);
   std::string CheckHTTPResponse(pp::TCPSocketPrivate* socket,
                                 const std::string& request,
                                 const std::string& response);
-  std::string SyncResolve(PP_Resource host_resolver,
+  std::string SyncResolve(pp::HostResolverPrivate* host_resolver,
                           const std::string& host,
                           uint16_t port,
                           const PP_HostResolver_Private_Hint& hint);
   std::string ParametrizedTestResolve(const PP_HostResolver_Private_Hint& hint);
 
-  std::string TestCreate();
+  std::string TestEmpty();
   std::string TestResolve();
   std::string TestResolveIPv4();
 
-  const PPB_Core* core_interface_;
-  const PPB_HostResolver_Private* host_resolver_private_interface_;
-
   std::string host_;
   uint16_t port_;
 };
 
 #endif  // PPAPI_TESTS_TEST_HOST_RESOLVER_PRIVATE_H_