Revert of Convert //net and //chromecast to std::unordered_*

net/disk_cache/simple/simple_backend_impl.h

Index: net/disk_cache/simple/simple_backend_impl.h
diff --git a/net/disk_cache/simple/simple_backend_impl.h b/net/disk_cache/simple/simple_backend_impl.h
index 791a686aa35089d1789a55da991448c08aa8fa09..6db401637612f7426fd9d8a38a4cd77146405070 100644
--- a/net/disk_cache/simple/simple_backend_impl.h
+++ b/net/disk_cache/simple/simple_backend_impl.h
@@ -8,12 +8,12 @@
 #include <stdint.h>
 
 #include <string>
-#include <unordered_map>
 #include <utility>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
+#include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -116,10 +116,10 @@
   class SimpleIterator;
   friend class SimpleIterator;
 
-  using EntryMap = std::unordered_map<uint64_t, SimpleEntryImpl*>;
-
-  using InitializeIndexCallback =
-      base::Callback<void(base::Time mtime, uint64_t max_size, int result)>;
+  typedef base::hash_map<uint64_t, SimpleEntryImpl*> EntryMap;
+
+  typedef base::Callback<void(base::Time mtime, uint64_t max_size, int result)>
+      InitializeIndexCallback;
 
   class ActiveEntryProxy;
   friend class ActiveEntryProxy;
@@ -210,8 +210,7 @@
   // these entries cannot have Doom/Create/Open operations run until the doom
   // is complete. The base::Closure map target is used to store deferred
   // operations to be run at the completion of the Doom.
-  std::unordered_map<uint64_t, std::vector<base::Closure>>
-      entries_pending_doom_;
+  base::hash_map<uint64_t, std::vector<base::Closure>> entries_pending_doom_;
 
   net::NetLog* const net_log_;
 };