Remove unused blink::WebStorageArea::memoryBytesUsedByCache().

content/renderer/dom_storage/dom_storage_cached_area.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 "content/renderer/dom_storage/dom_storage_cached_area.h"
 
 #include <limits>
 
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
@@ skipping 122 matching lines @@
 
   // It's a set item event.
   // We turn off quota checking here to accomodate the over budget
   // allowance that's provided in the browser process.
   base::NullableString16 unused;
   map_->set_quota(std::numeric_limits<int32_t>::max());
   map_->SetItem(key.string(), new_value.string(), &unused);
   map_->set_quota(kPerStorageAreaQuota);
 }
 
-size_t DOMStorageCachedArea::MemoryBytesUsedByCache() const {
-  return map_.get() ? map_->bytes_used() : 0;
-}
-
 void DOMStorageCachedArea::Prime(int connection_id) {
   DCHECK(!map_.get());
 
   // The LoadArea method is actually synchronous, but we have to
   // wait for an asyncly delivered message to know when incoming
   // mutation events should be applied. Our valuemap is plucked
   // from ipc stream out of order, mutations in front if it need
   // to be ignored.
 
   // Ignore all mutations until OnLoadComplete time.
@@ skipping 70 matching lines @@
     ignore_key_mutations_.erase(found);
 }
 
 void DOMStorageCachedArea::OnClearComplete(bool success) {
   DCHECK(success);
   DCHECK(ignore_all_mutations_);
   ignore_all_mutations_ = false;
 }
 
 }  // namespace content