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

net/disk_cache/simple/simple_backend_impl.cc

Index: net/disk_cache/simple/simple_backend_impl.cc
diff --git a/net/disk_cache/simple/simple_backend_impl.cc b/net/disk_cache/simple/simple_backend_impl.cc
index 5b7bfb096fa4fa55b4dea58799260599357137bc..00f6d15e129b678cb46870ab132ef76857c6db98 100644
--- a/net/disk_cache/simple/simple_backend_impl.cc
+++ b/net/disk_cache/simple/simple_backend_impl.cc
@@ -289,7 +289,7 @@
 
 void SimpleBackendImpl::OnDoomComplete(uint64_t entry_hash) {
   DCHECK_EQ(1u, entries_pending_doom_.count(entry_hash));
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator it =
       entries_pending_doom_.find(entry_hash);
   std::vector<Closure> to_run_closures;
   to_run_closures.swap(it->second);
@@ -378,7 +378,7 @@
 
   // TODO(gavinp): Factor out this (not quite completely) repetitive code
   // block from OpenEntry/CreateEntry/DoomEntry.
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator it =
       entries_pending_doom_.find(entry_hash);
   if (it != entries_pending_doom_.end()) {
     Callback<int(const net::CompletionCallback&)> operation =
@@ -406,7 +406,7 @@
   DCHECK_LT(0u, key.size());
   const uint64_t entry_hash = simple_util::GetEntryHashKey(key);
 
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator it =
       entries_pending_doom_.find(entry_hash);
   if (it != entries_pending_doom_.end()) {
     Callback<int(const net::CompletionCallback&)> operation =
@@ -425,7 +425,7 @@
                                  const net::CompletionCallback& callback) {
   const uint64_t entry_hash = simple_util::GetEntryHashKey(key);
 
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator it =
       entries_pending_doom_.find(entry_hash);
   if (it != entries_pending_doom_.end()) {
     Callback<int(const net::CompletionCallback&)> operation =
@@ -631,7 +631,7 @@
 int SimpleBackendImpl::OpenEntryFromHash(uint64_t entry_hash,
                                          Entry** entry,
                                          const CompletionCallback& callback) {
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator it =
       entries_pending_doom_.find(entry_hash);
   if (it != entries_pending_doom_.end()) {
     Callback<int(const net::CompletionCallback&)> operation =
@@ -660,7 +660,7 @@
   Entry** entry = new Entry*();
   scoped_ptr<Entry*> scoped_entry(entry);
 
-  std::unordered_map<uint64_t, std::vector<Closure>>::iterator pending_it =
+  base::hash_map<uint64_t, std::vector<Closure>>::iterator pending_it =
       entries_pending_doom_.find(entry_hash);
   if (pending_it != entries_pending_doom_.end()) {
     Callback<int(const net::CompletionCallback&)> operation =