[net/dns] Rename SystemHostResolverProc and CallSystemHostResolverProc.

net/dns/host_resolver_proc.cc

Index: net/dns/host_resolver_proc.cc
diff --git a/net/dns/host_resolver_proc.cc b/net/dns/host_resolver_proc.cc
index 6c786a13eba248277388d46dc689d34b2ac3c90e..fed3e07e410bc24f56d651966d13027b4a3aa7f6 100644
--- a/net/dns/host_resolver_proc.cc
+++ b/net/dns/host_resolver_proc.cc
@@ -81,7 +81,7 @@ int HostResolverProc::ResolveUsingPrevious(
   }
 
   // Final fallback is the system resolver.
-  return SystemHostResolverProc(host, address_family, host_resolver_flags,
+  return SystemHostResolverCall(host, address_family, host_resolver_flags,
                                 addrlist, os_error);
 }
 
@@ -119,7 +119,7 @@ HostResolverProc* HostResolverProc::GetDefault() {
   return default_proc_;
 }
 
-int SystemHostResolverProc(const std::string& host,
+int SystemHostResolverCall(const std::string& host,
                            AddressFamily address_family,
                            HostResolverFlags host_resolver_flags,
                            AddressList* addrlist,
@@ -248,4 +248,20 @@ int SystemHostResolverProc(const std::string& host,
   return OK;
 }
 
+SystemHostResolverProc::SystemHostResolverProc() : HostResolverProc(NULL) {}
+
+int SystemHostResolverProc::Resolve(const std::string& hostname,
+                                    AddressFamily address_family,
+                                    HostResolverFlags host_resolver_flags,
+                                    AddressList* addr_list,
+                                    int* os_error) {
+  return SystemHostResolverCall(hostname,
+                                address_family,
+                                host_resolver_flags,
+                                addr_list,
+                                os_error);
+}
+
+SystemHostResolverProc::~SystemHostResolverProc() {}
+
 }  // namespace net