Convert //base to use std::unique_ptr

base/profiler/stack_sampling_profiler_unittest.cc

Index: base/profiler/stack_sampling_profiler_unittest.cc
diff --git a/base/profiler/stack_sampling_profiler_unittest.cc b/base/profiler/stack_sampling_profiler_unittest.cc
index fad25a5929389512a47fc5095ffdbe9ab3c4f29e..12a05e150179c9a12c3cdadbb236343305f7a6cf 100644
--- a/base/profiler/stack_sampling_profiler_unittest.cc
+++ b/base/profiler/stack_sampling_profiler_unittest.cc
@@ -790,7 +790,7 @@ TEST(StackSamplingProfilerTest, MAYBE_DestroyProfilerWhileProfiling) {
 
   CallStackProfiles profiles;
   WithTargetThread([&params, &profiles](PlatformThreadId target_thread_id) {
-    scoped_ptr<StackSamplingProfiler> profiler;
+    std::unique_ptr<StackSamplingProfiler> profiler;
     profiler.reset(new StackSamplingProfiler(
         target_thread_id, params, Bind(&SaveProfiles, Unretained(&profiles))));
     profiler->Start();