Describe .nc files as "No Compile Test" suites and link doc.

base/bind_unittest.nc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This is a "No Compile Test" suite.
+// http://dev.chromium.org/developers/testing/no-compile-tests
+
 #include "base/callback.h"
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 
 namespace base {
 
 // Do not put everything inside an anonymous namespace.  If you do, many of the
 // helper function declarations will generate unused definition warnings.
 
 static const int kParentValue = 1;
@@ skipping 178 matching lines @@
 #elif defined(NCTEST_DISALLOW_ASSIGN_DIFFERENT_TYPES)  // [r"fatal error: no viable conversion from 'Callback<typename internal::BindState<typename internal::FunctorTraits<void \(\*\)\(int\)>::RunnableType, typename internal::FunctorTraits<void \(\*\)\(int\)>::RunType, internal::TypeList<> >::UnboundRunType>' to 'Callback<void \(\)>'"]
 
 // Bind result cannot be assigned to Callbacks with a mismatching type.
 void WontCompile() {
   Closure callback_mismatches_bind_type = Bind(&VoidPolymorphic1<int>);
 }
 
 #endif
 
 }  // namespace base