base: Change auto to not deduce raw pointers.

base/trace_event/memory_dump_manager_unittest.cc

Index: base/trace_event/memory_dump_manager_unittest.cc
diff --git a/base/trace_event/memory_dump_manager_unittest.cc b/base/trace_event/memory_dump_manager_unittest.cc
index 2f6d323e73abec8e78d6200b265fb91fe0ba122a..d14093cbcc352361e7cbfcc6c29fd43eea3a461a 100644
--- a/base/trace_event/memory_dump_manager_unittest.cc
+++ b/base/trace_event/memory_dump_manager_unittest.cc
@@ -473,11 +473,11 @@ TEST_F(MemoryDumpManagerTest, RespectTaskRunnerAffinity) {
   // invoked a number of times equal to its index.
   for (uint32_t i = kNumInitialThreads; i > 0; --i) {
     threads.push_back(WrapUnique(new Thread("test thread")));
-    auto thread = threads.back().get();
+    auto* thread = threads.back().get();
     thread->Start();
     scoped_refptr<SingleThreadTaskRunner> task_runner = thread->task_runner();
     mdps.push_back(WrapUnique(new MockMemoryDumpProvider()));
-    auto mdp = mdps.back().get();
+    auto* mdp = mdps.back().get();
     RegisterDumpProvider(mdp, task_runner, kDefaultOptions);
     EXPECT_CALL(*mdp, OnMemoryDump(_, _))
         .Times(i)