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

This patch updates the code to prevent auto deducing to a raw pointer.

R=asvitkine@chromium.org
BUG=554600

Review-Url: https://codereview.chromium.org/2195503002
Cr-Commit-Position: refs/heads/master@{#408761}

chrome/browser/metrics/leak_detector/leak_detector_controller_unittest.cc

@@ -83,7 +83,7 @@ TEST(LeakDetectorControllerTest, SingleReport) {
 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);
 

chrome/browser/metrics/perf/cpu_identity.cc

@@ -77,9 +77,9 @@ std::string GetIntelUarch(const CPUIdentity& cpuid) {
   std::string family_model =
       base::StringPrintf("%02X_%02X", cpuid.family, cpuid.model);
   const internal::IntelUarchTableEntry search_elem = {family_model.c_str(), ""};
-  const auto bound = std::lower_bound(
-      internal::kIntelUarchTable, internal::kIntelUarchTableEnd,
-      search_elem, internal::IntelUarchTableCmp);
+  auto* bound = std::lower_bound(internal::kIntelUarchTable,
+                                 internal::kIntelUarchTableEnd, search_elem,
+                                 internal::IntelUarchTableCmp);
   if (bound->family_model != family_model)
     return std::string();  // Unknown uarch
   return bound->uarch;