Unlink corrupt SimpleCache index files immediately after load.

net/disk_cache/simple/simple_index_file.cc

 // Copyright (c) 2013 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/simple/simple_index_file.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
@@ skipping 160 matching lines @@
   // If not true, we need to restore the index.
   return index_mtime < dir_mtime;
 }
 
 // static
 scoped_ptr<SimpleIndex::EntrySet> SimpleIndexFile::LoadFromDisk(
     const base::FilePath& index_filename) {
   std::string contents;
   if (!file_util::ReadFileToString(index_filename, &contents)) {
     LOG(WARNING) << "Could not read Simple Index file.";
+    file_util::Delete(index_filename, false);
     return scoped_ptr<SimpleIndex::EntrySet>();
   }
 
-  return SimpleIndexFile::Deserialize(contents.data(), contents.size());
+  scoped_ptr<SimpleIndex::EntrySet> entries =
+      SimpleIndexFile::Deserialize(contents.data(), contents.size());
+  if (!entries) {
+    file_util::Delete(index_filename, false);
+    return scoped_ptr<SimpleIndex::EntrySet>();
+  }
+
+  return entries.Pass();
 }
 
 // static
 scoped_ptr<SimpleIndex::EntrySet> SimpleIndexFile::Deserialize(const char* data,
                                                                int data_len) {
   DCHECK(data);
   Pickle pickle(data, data_len);
   if (!pickle.data()) {
     LOG(WARNING) << "Corrupt Simple Index File.";
     return scoped_ptr<SimpleIndex::EntrySet>();
@@ skipping 177 matching lines @@
           index_file_entries.get());
     } else {
       // Summing up the total size of the entry through all the *_[0-2] files
       it->second.SetEntrySize(it->second.GetEntrySize() + file_size);
     }
   }
   return index_file_entries.Pass();
 }
 
 }  // namespace disk_cache