Remove `Runnable` concept from base/bind_internal.h

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/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
@@ skipping 139 matching lines @@
 
 // Binding functions with reference parameters, unsupported.
 //
 // See comment in NCTEST_DISALLOW_NON_CONST_REF_PARAM
 void WontCompile() {
   Parent p;
   Callback<int()> ref_cb = Bind(&UnwrapParentRef, p);
   ref_cb.Run();
 }
 
-#elif defined(NCTEST_NO_IMPLICIT_ARRAY_PTR_CONVERSION)  // [r"fatal error: static_assert failed \"first bound argument to method cannot be array\""]
+#elif defined(NCTEST_NO_IMPLICIT_ARRAY_PTR_CONVERSION)  // [r"fatal error: static_assert failed \"First bound argument to a method cannot be an array.\""]
 
 // A method should not be bindable with an array of objects.
 //
 // This is likely not wanted behavior. We specifically check for it though
 // because it is possible, depending on how you implement prebinding, to
 // implicitly convert an array type to a pointer type.
 void WontCompile() {
   HasRef p[10];
   Callback<void()> method_bound_to_array_cb =
       Bind(&HasRef::VoidMethod0, p);
   method_bound_to_array_cb.Run();
 }
 
-#elif defined(NCTEST_NO_RAW_PTR_FOR_REFCOUNTED_TYPES)  // [r"fatal error: static_assert failed \"a parameter is a refcounted type and needs scoped_refptr\""]
+#elif defined(NCTEST_NO_RAW_PTR_FOR_REFCOUNTED_TYPES)  // [r"fatal error: static_assert failed \"A parameter is a refcounted type and needs scoped_refptr.\""]
 
 // Refcounted types should not be bound as a raw pointer.
 void WontCompile() {
   HasRef for_raw_ptr;
   int a;
   Callback<void()> ref_count_as_raw_ptr_a =
       Bind(&VoidPolymorphic1<int*>, &a);
   Callback<void()> ref_count_as_raw_ptr =
       Bind(&VoidPolymorphic1<HasRef*>, &for_raw_ptr);
 }
@@ skipping 12 matching lines @@
 #elif defined(NCTEST_DISALLOW_ASSIGN_DIFFERENT_TYPES)  // [r"fatal error: no viable conversion from 'Callback<MakeUnboundRunType<void \(\*\)\(int\)>>' 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