Replace uses of hash_map in //base

base/trace_event/trace_log.h

 // Copyright 2015 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.
 
 #ifndef BASE_TRACE_EVENT_TRACE_LOG_H_
 #define BASE_TRACE_EVENT_TRACE_LOG_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 #include "base/atomicops.h"
-#include "base/containers/hash_tables.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "base/trace_event/trace_config.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "build/build_config.h"
 
 namespace base {
 
@@ skipping 418 matching lines @@
   uint8_t enabled_modes_;  // See TraceLog::Mode.
   int num_traces_recorded_;
   std::unique_ptr<TraceBuffer> logged_events_;
   std::vector<std::unique_ptr<TraceEvent>> metadata_events_;
   bool dispatching_to_observer_list_;
   std::vector<EnabledStateObserver*> enabled_state_observer_list_;
   std::map<AsyncEnabledStateObserver*, RegisteredAsyncObserver>
       async_observers_;
 
   std::string process_name_;
-  base::hash_map<int, std::string> process_labels_;
+  std::unordered_map<int, std::string> process_labels_;
   int process_sort_index_;
-  base::hash_map<int, int> thread_sort_indices_;
-  base::hash_map<int, std::string> thread_names_;
+  std::unordered_map<int, int> thread_sort_indices_;
+  std::unordered_map<int, std::string> thread_names_;
 
   // The following two maps are used only when ECHO_TO_CONSOLE.
-  base::hash_map<int, std::stack<TimeTicks>> thread_event_start_times_;
-  base::hash_map<std::string, int> thread_colors_;
+  std::unordered_map<int, std::stack<TimeTicks>> thread_event_start_times_;
+  std::unordered_map<std::string, int> thread_colors_;
 
   TimeTicks buffer_limit_reached_timestamp_;
 
   // XORed with TraceID to make it unlikely to collide with other processes.
   unsigned long long process_id_hash_;
 
   int process_id_;
 
   TimeDelta time_offset_;
 
@@ skipping 25 matching lines @@
 
   FilterFactoryForTesting filter_factory_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceLog);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_TRACE_LOG_H_