Remove uses of base::hash_map from //chrome

chrome/browser/android/data_usage/external_data_use_reporter.h

Index: chrome/browser/android/data_usage/external_data_use_reporter.h
diff --git a/chrome/browser/android/data_usage/external_data_use_reporter.h b/chrome/browser/android/data_usage/external_data_use_reporter.h
index 22e1207287c40967202d35dde760f85a91ce0ac5..c0592776cedd3177bb4e585ab5459582e2afc692 100644
--- a/chrome/browser/android/data_usage/external_data_use_reporter.h
+++ b/chrome/browser/android/data_usage/external_data_use_reporter.h
@@ -10,10 +10,10 @@
 
 #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"
@@ -171,8 +171,9 @@ class ExternalDataUseReporter {
     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.