Use movable types for CallStackProfile(s) to remove copying of data.

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 3a59e6d2c300ff58534d4cac8b8e80a9ea1fd2c0..332db14ad7a3cf4567c0b7a27493214ef8b79175 100644
--- a/base/profiler/stack_sampling_profiler_unittest.cc
+++ b/base/profiler/stack_sampling_profiler_unittest.cc
@@ -309,8 +309,8 @@ void SynchronousUnloadNativeLibrary(NativeLibrary library) {
 
 // Called on the profiler thread when complete, to collect profiles.
 void SaveProfiles(CallStackProfiles* profiles,
-                  const CallStackProfiles& pending_profiles) {
-  *profiles = pending_profiles;
+                  CallStackProfiles pending_profiles) {
+  *profiles = std::move(pending_profiles);

[Mike Wittman, 2016/10/21 18:05:29]

IWYU: <utility>

... and throughout this CL

[bcwhite, 2016/10/24 13:17:45]

Done.

 }
 
 // Called on the profiler thread when complete. Collects profiles produced by
@@ -318,8 +318,8 @@ void SaveProfiles(CallStackProfiles* profiles,
 // the profiler is done.
 void SaveProfilesAndSignalEvent(CallStackProfiles* profiles,
                                 WaitableEvent* event,
-                                const CallStackProfiles& pending_profiles) {
-  *profiles = pending_profiles;
+                                CallStackProfiles pending_profiles) {
+  *profiles = std::move(pending_profiles);
   event->Signal();
 }