Inform disk cache of WebKit memory cache hits.

net/disk_cache/backend_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/backend_impl.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/metrics/field_trial.h"
@@ skipping 664 matching lines @@
 int BackendImpl::SyncOpenPrevEntry(void** iter, Entry** prev_entry) {
   *prev_entry = OpenPrevEntryImpl(iter);
   return (*prev_entry) ? net::OK : net::ERR_FAILED;
 }
 
 void BackendImpl::SyncEndEnumeration(void* iter) {
   scoped_ptr<Rankings::Iterator> iterator(
       reinterpret_cast<Rankings::Iterator*>(iter));
 }
 
+void BackendImpl::SyncOnExternalCacheHit(const std::string& key) {
+  uint32 hash = Hash(key);
+  bool error;
+  EntryImpl* cache_entry = MatchEntry(key, hash, false, Addr(), &error);
+  if (cache_entry) {
+    if (ENTRY_NORMAL == cache_entry->entry()->Data()->state) {
+      UpdateRank(cache_entry, false);
+    }
+    cache_entry->Release();
+  }
+}
+
 EntryImpl* BackendImpl::OpenEntryImpl(const std::string& key) {
   if (disabled_)
     return NULL;
 
   TimeTicks start = TimeTicks::Now();
   uint32 hash = Hash(key);
   Trace("Open hash 0x%x", hash);
 
   bool error;
   EntryImpl* cache_entry = MatchEntry(key, hash, false, Addr(), &error);
@@ skipping 654 matching lines @@
   item.second = base::StringPrintf("%d", max_size_);
   stats->push_back(item);
 
   item.first = "Current size";
   item.second = base::StringPrintf("%d", data_->header.num_bytes);
   stats->push_back(item);
 
   stats_.GetItems(stats);
 }
 
+void BackendImpl::OnExternalCacheHit(const std::string& key) {
+  background_queue_.OnExternalCacheHit(key);
+}
+
 // ------------------------------------------------------------------------
 
 // We just created a new file so we're going to write the header and set the
 // file length to include the hash table (zero filled).
 bool BackendImpl::CreateBackingStore(disk_cache::File* file) {
   AdjustMaxCacheSize(0);
 
   IndexHeader header;
   header.table_len = DesiredIndexTableLen(max_size_);
 
@@ skipping 727 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache