content: Change auto to not deduce raw pointers.

content/browser/tracing/tracing_controller_browsertest.cc

 // Copyright 2013 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 "content/public/browser/tracing_controller.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/files/file_util.h"
@@ skipping 19 matching lines @@
 namespace {
 
 const char* kMetadataWhitelist[] = {
   "cpu-brand",
   "network-type",
   "os-name",
   "user-agent"
 };
 
 bool IsMetadataWhitelisted(const std::string& metadata_name) {
-  for (auto key : kMetadataWhitelist) {
+  for (auto* key : kMetadataWhitelist) {
     if (base::MatchPattern(metadata_name, key)) {
       return true;
     }
   }
   return false;
 }
 
 bool IsTraceEventArgsWhitelisted(
     const char* category_group_name,
     const char* event_name,
@@ skipping 384 matching lines @@
 
   TracingController* controller = TracingController::GetInstance();
   EXPECT_TRUE(controller->StartTracing(
       TraceConfig(),
       TracingController::StartTracingDoneCallback()));
   EXPECT_TRUE(controller->StopTracing(NULL));
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace content