Reland of ppapi: PPB_VpnProvider: Implement Resource Host

ppapi/shared_impl/vpn_provider_util.h

Index: ppapi/shared_impl/vpn_provider_util.h
diff --git a/ppapi/shared_impl/vpn_provider_util.h b/ppapi/shared_impl/vpn_provider_util.h
index 889bfaa7afc1c6901de9662ebc74ba2b44a78c6f..e5f9d3d84687ec88759201e009fd50083fc9ea50 100644
--- a/ppapi/shared_impl/vpn_provider_util.h
+++ b/ppapi/shared_impl/vpn_provider_util.h
@@ -23,14 +23,17 @@
   void SetAvailable(uint32_t id, bool value);
   void* GetBuffer(uint32_t id);
   base::SharedMemoryHandle GetHandle();
+  uint32_t max_packet_size() { return max_packet_size_; }
 
  private:
   uint32_t capacity_;
-  uint32_t packet_size_;
+  uint32_t max_packet_size_;
   std::unique_ptr<base::SharedMemory> shm_;
   std::vector<bool> available_;
+
+  DISALLOW_COPY_AND_ASSIGN(VpnProviderSharedBuffer);
 };
 
 }  // namespace ppapi
 
-#endif  // PPAPI_SHAERD_IMPL_VPN_PROVIDER_UTIL_H_
+#endif  // PPAPI_SHAERD_IMPL_VPN_PROVIDER_UTIL_H_