Allow std::unordered_*.

net/disk_cache/simple/simple_index_file.cc

Index: net/disk_cache/simple/simple_index_file.cc
diff --git a/net/disk_cache/simple/simple_index_file.cc b/net/disk_cache/simple/simple_index_file.cc
index 7e80c02fa223687df2c8e32ed54c5bf5d251fd6f..025ffe986244d9374091747ab4fec737e5de2e1e 100644
--- a/net/disk_cache/simple/simple_index_file.cc
+++ b/net/disk_cache/simple/simple_index_file.cc
@@ -423,10 +423,7 @@ void SimpleIndexFile::Deserialize(const char* data, int data_len,
     return;
   }
 
-#if !defined(OS_WIN)
-  // TODO(gavinp): Consider using std::unordered_map.
-  entries->resize(index_metadata.GetNumberOfEntries() + kExtraSizeForMerge);
-#endif
+  entries->reserve(index_metadata.GetNumberOfEntries() + kExtraSizeForMerge);
   while (entries->size() < index_metadata.GetNumberOfEntries()) {
     uint64_t hash_key;
     EntryMetadata entry_metadata;