Callback API Change: Allow Bind() to take a Callback<> and bind all its free parameters.

base/bind_internal.h.pump

 $$ This is a pump file for generating file templates.  Pump is a python
 $$ script that is part of the Google Test suite of utilities.  Description
 $$ can be found here:
 $$
 $$ http://code.google.com/p/googletest/wiki/PumpManual
 $$
 
 $var MAX_ARITY = 6
 
 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
@@ skipping 248 matching lines @@
 $for M_UNBOUND_ARG , [[x$(M_UNBOUND_ARG)]]);
   }
 };
 
 ]]  $$ if BOUND
 
 ]]  $$ if UNBOUND
 ]]  $$ for ARITY
 ]]  $$ for BOUND
 
+// BindMoreFuncN<>
+//
+// This set of functions help in fully binding the free parameters in a
+// Callback<>.
+$for BOUND [[
+$range BOUND_ARG 1..BOUND
+$if BOUND != 0 [[
+
+template <typename Sig, $for BOUND_ARG , [[typename P$(BOUND_ARG)]]>
+void BindMoreFunc$(BOUND)(const base::Callback<Sig>& callback, [[]]
+$for BOUND_ARG , [[const P$(BOUND_ARG)& p$(BOUND_ARG)]]) {
+  callback.Run($for BOUND_ARG , [[p$(BOUND_ARG)]]);
+}
+
+]]  $$ if BOUND
+]]  $$ for BOUND
+
 // InvokerStorageN<>
 //
 // These are the actual storage classes for the Invokers.
 //
 // Though these types are "classes", they are being used as structs with
 // all member variable public.  We cannot make it a struct because it inherits
 // from a class which causes a compiler warning.  We cannot add a "Run()" method
 // that forwards the unbound arguments because that would require we unwrap the
 // Sig type like in InvokerN above to know the return type, and the arity
 // of Run().
@@ skipping 93 matching lines @@
 
 ]]
 };
 
 ]]  $$ for BOUND
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_BIND_INTERNAL_H_