Inform disk cache of WebKit memory cache hits.

net/disk_cache/mem_entry_impl.cc

 // 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.
 
 #include "net/disk_cache/mem_entry_impl.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
@@ skipping 241 matching lines @@
 bool MemEntryImpl::CouldBeSparse() const {
   DCHECK_EQ(kParentEntry, type());
   return (children_.get() != NULL);
 }
 
 int MemEntryImpl::ReadyForSparseIO(
     net::CompletionCallback* completion_callback) {
   return net::OK;
 }
 
+void MemEntryImpl::UpdateRankForExternalCacheHit() {
+  UpdateRank(false);
+}
+
 // ------------------------------------------------------------------------
 
 MemEntryImpl::~MemEntryImpl() {
   for (int i = 0; i < NUM_STREAMS; i++)
     backend_->ModifyStorageSize(data_size_[i], 0);
   backend_->ModifyStorageSize(static_cast<int32>(key_.size()), 0);
   net_log_.EndEvent(net::NetLog::TYPE_DISK_CACHE_MEM_ENTRY_IMPL, NULL);
 }
 
 int MemEntryImpl::InternalReadData(int index, int offset, net::IOBuffer* buf,
@@ skipping 343 matching lines @@
     scanned_len += kMaxSparseEntrySize - current_child_offset;
   }
   return scanned_len;
 }
 
 void MemEntryImpl::DetachChild(int child_id) {
   children_->erase(child_id);
 }
 
 }  // namespace disk_cache