Convert Pass()→std::move() in //chrome

chrome/browser/metrics/extensions_metrics_provider_unittest.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/metrics/extensions_metrics_provider.h"
 
 #include <stdint.h>
 
 #include <string>
 
@@ skipping 56 matching lines @@
     extensions->Insert(extension);
     extension =
         extensions::ExtensionBuilder()
             .SetManifest(std::move(extensions::DictionaryBuilder()
                                        .Set("name", "Colliding Extension")
                                        .Set("version", "1.0.0")
                                        .Set("manifest_version", 2)))
             .SetID("mdhofdjgenpkhlmddfaegdjddcecipmo")
             .Build();
     extensions->Insert(extension);
-    return extensions.Pass();
+    return extensions;
   }
 
   // Override GetClientID() to return a specific value on which test
   // expectations are based.
   uint64_t GetClientID() override { return 0x3f1bfee9; }
 };
 
 }  // namespace
 
 // Checks that the hash function used to hide precise extension IDs produces
@@ skipping 24 matching lines @@
           &local_state,
           base::Bind(&IsMetricsReportingEnabled),
           base::Bind(&StoreNoClientInfoBackup),
           base::Bind(&ReturnNoBackup)));
   TestExtensionsMetricsProvider extension_metrics(metrics_state_manager.get());
   extension_metrics.ProvideSystemProfileMetrics(&system_profile);
   ASSERT_EQ(2, system_profile.occupied_extension_bucket_size());
   EXPECT_EQ(10, system_profile.occupied_extension_bucket(0));
   EXPECT_EQ(1007, system_profile.occupied_extension_bucket(1));
 }