Remove RefCountedMallocedMemory, it's not used.

base/memory/ref_counted_memory.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/memory/ref_counted_memory.h"
 
-#include <stdlib.h>
-
 #include "base/logging.h"
 
 namespace base {
 
 bool RefCountedMemory::Equals(
     const scoped_refptr<RefCountedMemory>& other) const {
   return other.get() &&
          size() == other->size() &&
          (memcmp(front(), other->front(), size()) == 0);
 }
@@ skipping 53 matching lines @@
 
 const unsigned char* RefCountedString::front() const {
   return data_.empty() ? NULL :
          reinterpret_cast<const unsigned char*>(data_.data());
 }
 
 size_t RefCountedString::size() const {
   return data_.size();
 }
 
-RefCountedMallocedMemory::RefCountedMallocedMemory(
-    void* data, size_t length)
-    : data_(reinterpret_cast<unsigned char*>(data)), length_(length) {
-  DCHECK(data || length == 0);
-}
-
-const unsigned char* RefCountedMallocedMemory::front() const {
-  return length_ ? data_ : NULL;
-}
-
-size_t RefCountedMallocedMemory::size() const {
-  return length_;
-}
-
-RefCountedMallocedMemory::~RefCountedMallocedMemory() {
-  free(data_);
-}
-
 }  //  namespace base