chrome/browser/metrics: Change auto to not deduce raw pointers.

chrome/browser/metrics/leak_detector/leak_detector_controller_unittest.cc

 // 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.
 
 #include "chrome/browser/metrics/leak_detector/leak_detector_controller.h"
 
 #include <set>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
@@ skipping 65 matching lines @@
   EXPECT_EQ(4U, proto.params().call_stack_suspicion_threshold());
 
   // No more reports.
   controller->GetLeakReports(&stored_reports);
   ASSERT_EQ(0U, stored_reports.size());
 }
 
 TEST(LeakDetectorControllerTest, SingleReportHistory) {
   MemoryLeakReportProto report;
 
-  auto entry = report.add_alloc_breakdown_history();
+  auto* entry = report.add_alloc_breakdown_history();
   InitializeRepeatedField({100, 200, 300}, entry->mutable_counts_by_size());
   entry->set_count_for_call_stack(15);
 
   entry = report.add_alloc_breakdown_history();
   InitializeRepeatedField({150, 250, 350, 650},
                           entry->mutable_counts_by_size());
   entry->set_count_for_call_stack(30);
 
   entry = report.add_alloc_breakdown_history();
   InitializeRepeatedField({200, 300, 400, 700, 800},
@@ skipping 148 matching lines @@
   EXPECT_EQ(13U, stored_reports[2].call_stack().Get(4));
   EXPECT_EQ(14U, stored_reports[2].call_stack().Get(5));
   EXPECT_EQ(15U, stored_reports[2].call_stack().Get(6));
   EXPECT_EQ(16U, stored_reports[2].call_stack().Get(7));
 
   controller->GetLeakReports(&stored_reports);
   ASSERT_EQ(0U, stored_reports.size());
 }
 
 }  // namespace metrics