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

ipc/attachment_broker_privileged_win_unittest.cc

Index: ipc/attachment_broker_privileged_win_unittest.cc
diff --git a/ipc/attachment_broker_privileged_win_unittest.cc b/ipc/attachment_broker_privileged_win_unittest.cc
index 870e262a11122f48503573014d7d3315da3c6ed6..27f4f146e555e880dc8b1a022af1868be06711ad 100644
--- a/ipc/attachment_broker_privileged_win_unittest.cc
+++ b/ipc/attachment_broker_privileged_win_unittest.cc
@@ -76,7 +76,7 @@ ScopedHandle GetHandleFromTestHandleWinMsg(const IPC::Message& message) {
     return ScopedHandle(nullptr);
   }
 
-  IPC::HandleWin handle_win = base::get<1>(p);
+  IPC::HandleWin handle_win = std::get<1>(p);
   return ScopedHandle(handle_win.get_handle());
 }
 
@@ -97,7 +97,7 @@ scoped_ptr<base::SharedMemory> GetSharedMemoryFromSharedMemoryHandleMsg1(
     return nullptr;
   }
 
-  base::SharedMemoryHandle handle = base::get<0>(p);
+  base::SharedMemoryHandle handle = std::get<0>(p);
   scoped_ptr<base::SharedMemory> shared_memory(
       new base::SharedMemory(handle, false));
 
@@ -123,9 +123,9 @@ bool GetHandleFromTestTwoHandleWinMsg(const IPC::Message& message,
     return false;
   }
 
-  IPC::HandleWin handle_win = base::get<0>(p);
+  IPC::HandleWin handle_win = std::get<0>(p);
   *h1 = handle_win.get_handle();
-  handle_win = base::get<1>(p);
+  handle_win = std::get<1>(p);
   *h2 = handle_win.get_handle();
   return true;
 }