Remove uses of base::hash_map from //chrome

chrome/browser/android/data_usage/external_data_use_reporter.h

 // Copyright 2016 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 CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_
 #define CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 #include "base/callback.h"
-#include "base/containers/hash_tables.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "chrome/browser/android/data_usage/data_use_tab_model.h"
 #include "net/base/network_change_notifier.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/application_status_listener.h"
 #endif
@@ skipping 137 matching lines @@
   };
 
   // Class that implements hash operator on DataUseReportKey.
   class DataUseReportKeyHash {
    public:
     // A simple heuristical hash function that satisifes the property that two
     // equal data structures have the same hash value.
     size_t operator()(const DataUseReportKey& k) const;
   };
 
-  typedef base::hash_map<DataUseReportKey, DataUseReport, DataUseReportKeyHash>
-      DataUseReports;
+  typedef std::
+      unordered_map<DataUseReportKey, DataUseReport, DataUseReportKeyHash>
+          DataUseReports;
 
   // Maximum size of the data use report buffer. Once this limit is reached, new
   // reports will be ignored.
   // TODO(rajendrant): Instead of the ignoring the new data use report, remove
   // the oldest report entry.
   static const size_t kMaxBufferSize;
 
   // Adds |data_use| to buffered reports. |data_use| is the received data use
   // report. |label| is a non-empty label that applies to |data_use|. |tag| is
   // the tag to be applied for this data use. |start_time| and |end_time| are
@@ skipping 63 matching lines @@
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalDataUseReporter);
 };
 
 }  // namespace android
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_DATA_USAGE_EXTERNAL_DATA_USE_REPORTER_H_