Move Tuple to base namespace.

content/child/threaded_data_provider.cc

Index: content/child/threaded_data_provider.cc
diff --git a/content/child/threaded_data_provider.cc b/content/child/threaded_data_provider.cc
index 5e0fe9702c0299c1e6826a6484b92341292875b1..4dbcb38779562b374f29eadd2d18e4232c3091db 100644
--- a/content/child/threaded_data_provider.cc
+++ b/content/child/threaded_data_provider.cc
@@ -97,7 +97,8 @@ bool DataProviderMessageFilter::OnMessageReceived(
   if (request_id == request_id_) {
     ResourceMsg_DataReceived::Schema::Param arg;
     if (ResourceMsg_DataReceived::Read(&message, &arg)) {
-      OnReceivedData(get<0>(arg), get<1>(arg), get<2>(arg), get<3>(arg));
+      OnReceivedData(base::get<0>(arg), base::get<1>(arg),
+                     base::get<2>(arg), base::get<3>(arg));
       return true;
     }
   }