Delete some dead code.

base/bind_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "base/bind.h"
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 109 matching lines @@
       (*assigns_)++;
     }
 
     return *this;
   }
 
   int copies() const {
     return *copies_;
   }
 
-  int assigns() const {
-    return *assigns_;
-  }
-
  private:
   int* copies_;
   int* assigns_;
 };
 
 class DeleteCounter {
  public:
   explicit DeleteCounter(int* deletes)
       : deletes_(deletes) {
   }
@@ skipping 680 matching lines @@
   base::Callback<void(int)> null_cb;
   ASSERT_TRUE(null_cb.is_null());
   EXPECT_DEATH(base::Bind(null_cb, 42), "");
 }
 
 #endif  // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) &&
         //     GTEST_HAS_DEATH_TEST
 
 }  // namespace
 }  // namespace base