PPAPI: Refactor renderer side of browser host creation

ppapi/proxy/serialized_structs.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_PROXY_SERIALIZED_STRUCTS_H_
 #define PPAPI_PROXY_SERIALIZED_STRUCTS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 121 matching lines @@
   base::SharedMemoryHandle handle;
 };
 
 // TODO(raymes): Make ImageHandle compatible with SerializedHandle.
 #if defined(OS_WIN)
 typedef HANDLE ImageHandle;
 #else
 typedef base::SharedMemoryHandle ImageHandle;
 #endif
 
+// CompletedBrowserResourceHosts contains information about the browser-side
+// hosts for resources that the renderer asked the browser to create.
+struct CompletedBrowserResourceHosts {
+  CompletedBrowserResourceHosts() : sequence_number(0) {}
+  CompletedBrowserResourceHosts(int sequence_number_param,
+                                const std::vector<int>& host_ids_param)
+      : sequence_number(sequence_number_param), host_ids(host_ids_param) {}
+  int sequence_number;
+  std::vector<int> host_ids;
+};
+
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_SERIALIZED_STRUCTS_H_