Rename "NoBarrier" memory operations to "Relaxed".

src/libsampler/sampler.cc

Index: src/libsampler/sampler.cc
diff --git a/src/libsampler/sampler.cc b/src/libsampler/sampler.cc
index f65498aa607b10078cc5ac0a6fb8c929ec6b47fd..7d63c6a7b76e9783ee4796b63b1ec508e7bc850d 100644
--- a/src/libsampler/sampler.cc
+++ b/src/libsampler/sampler.cc
@@ -602,7 +602,7 @@ void Sampler::Stop() {
 
 
 void Sampler::IncreaseProfilingDepth() {
-  base::NoBarrier_AtomicIncrement(&profiling_, 1);
+  base::Relaxed_AtomicIncrement(&profiling_, 1);
 #if defined(USE_SIGNALS)
   SignalHandler::IncreaseSamplerCount();
 #endif
@@ -613,7 +613,7 @@ void Sampler::DecreaseProfilingDepth() {
 #if defined(USE_SIGNALS)
   SignalHandler::DecreaseSamplerCount();
 #endif
-  base::NoBarrier_AtomicIncrement(&profiling_, -1);
+  base::Relaxed_AtomicIncrement(&profiling_, -1);
 }