RFC: use some in-memory state in SimpleCache to quickly cache-miss some CantConditionalize cases

net/http/mock_http_cache.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 "net/http/mock_http_cache.h"
 
 #include <limits>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 50 matching lines @@
 //-----------------------------------------------------------------------------
 
 struct MockDiskEntry::CallbackInfo {
   scoped_refptr<MockDiskEntry> entry;
   CompletionCallback callback;
   int result;
 };
 
 MockDiskEntry::MockDiskEntry(const std::string& key)
     : key_(key),
+      memory_entry_data_(0),
       doomed_(false),
       sparse_(false),
       fail_requests_(false),
       fail_sparse_requests_(false),
       busy_(false),
       delayed_(false),
       cancel_(false) {
   test_mode_ = GetTestModeForEntry(key);
 }
 
@@ skipping 433 matching lines @@
 
 void MockDiskCache::OnExternalCacheHit(const std::string& key) {
 }
 
 size_t MockDiskCache::DumpMemoryStats(
     base::trace_event::ProcessMemoryDump* pmd,
     const std::string& parent_absolute_name) const {
   return 0u;
 }
 
+uint8_t MockDiskCache::GetMemoryEntryData(const std::string& key) {
+  EntryMap::iterator it = entries_.find(key);
+  if (it != entries_.end())
+    return it->second->memory_entry_data();
+  return 0;
+}
+
+void MockDiskCache::SetMemoryEntryData(const std::string& key, uint8_t data) {
+  EntryMap::iterator it = entries_.find(key);
+  if (it != entries_.end())
+    it->second->set_memory_entry_data(data);
+}
+
 void MockDiskCache::ReleaseAll() {
   EntryMap::iterator it = entries_.begin();
   for (; it != entries_.end(); ++it)
     it->second->Release();
   entries_.clear();
 }
 
 void MockDiskCache::CallbackLater(const CompletionCallback& callback,
                                   int result) {
   base::ThreadTaskRunnerHandle::Get()->PostTask(
@@ skipping 204 matching lines @@
   if (!callback_.is_null()) {
     if (!fail_)
       backend_->reset(new MockDiskCache());
     CompletionCallback cb = callback_;
     callback_.Reset();
     cb.Run(Result());  // This object can be deleted here.
   }
 }
 
 }  // namespace net