Replace base::Tuple in //ipc with std::tuple

ipc/ipc_message_templates.h

Index: ipc/ipc_message_templates.h
diff --git a/ipc/ipc_message_templates.h b/ipc/ipc_message_templates.h
index 17dfc1b9ff221169167c2f3103089a219e14fa5e..95cf92e18c9c9c758f52e0eb3e56d8fdcd1b8205 100644
--- a/ipc/ipc_message_templates.h
+++ b/ipc/ipc_message_templates.h
@@ -35,7 +35,7 @@ void DispatchToMethodImpl(ObjT* obj,
                           const Tuple& tuple,
                           base::IndexSequence<Ns...>) {
   // TODO(mdempsky): Apply UnwrapTraits like base::DispatchToMethod?
-  (obj->*method)(parameter, base::get<Ns>(tuple)...);
+  (obj->*method)(parameter, std::get<Ns>(tuple)...);
 }
 
 // The following function is for async IPCs which have a dispatcher with an
@@ -45,7 +45,7 @@ typename std::enable_if<sizeof...(Args) == sizeof...(Ts)>::type
 DispatchToMethod(ObjT* obj,
                  void (ObjT::*method)(P*, Args...),
                  P* parameter,
-                 const base::Tuple<Ts...>& tuple) {
+                 const std::tuple<Ts...>& tuple) {
   DispatchToMethodImpl(obj, method, parameter, tuple,
                        base::MakeIndexSequence<sizeof...(Ts)>());
 }
@@ -84,9 +84,9 @@ class MessageT;
 
 // Asynchronous message partial specialization.
 template <typename Meta, typename... Ins>
-class MessageT<Meta, base::Tuple<Ins...>, void> : public Message {
+class MessageT<Meta, std::tuple<Ins...>, void> : public Message {
  public:
-  using Param = base::Tuple<Ins...>;
+  using Param = std::tuple<Ins...>;
   enum { ID = Meta::ID };
 
   // TODO(mdempsky): Remove.  Uses of MyMessage::Schema::Param can be replaced
@@ -127,11 +127,11 @@ class MessageT<Meta, base::Tuple<Ins...>, void> : public Message {
 
 // Synchronous message partial specialization.
 template <typename Meta, typename... Ins, typename... Outs>
-class MessageT<Meta, base::Tuple<Ins...>, base::Tuple<Outs...>>
+class MessageT<Meta, std::tuple<Ins...>, std::tuple<Outs...>>
     : public SyncMessage {
  public:
-  using SendParam = base::Tuple<Ins...>;
-  using ReplyParam = base::Tuple<Outs...>;
+  using SendParam = std::tuple<Ins...>;
+  using ReplyParam = std::tuple<Outs...>;
   enum { ID = Meta::ID };
 
   // TODO(mdempsky): Remove.  Uses of MyMessage::Schema::{Send,Reply}Param can
@@ -186,7 +186,7 @@ class MessageT<Meta, base::Tuple<Ins...>, base::Tuple<Outs...>>
     bool ok = ReadSendParam(msg, &send_params);
     Message* reply = SyncMessage::GenerateReply(msg);
     if (ok) {
-      base::Tuple<Message&> t = base::MakeRefTuple(*reply);
+      std::tuple<Message&> t = std::tie(*reply);
       ConnectMessageAndReply(msg, reply);
       base::DispatchToMethod(obj, func, send_params, &t);
     } else {