diff --git a/runtime/base/timing_logger.cc b/runtime/base/timing_logger.cc
index 23ec3e1..0a4cddd 100644
--- a/runtime/base/timing_logger.cc
+++ b/runtime/base/timing_logger.cc
@@ -21,6 +21,7 @@
 #include <android-base/logging.h>
 
 #include "base/histogram-inl.h"
+#include "base/mutex.h"
 #include "base/stl_util.h"
 #include "base/systrace.h"
 #include "base/time_utils.h"
@@ -40,7 +41,7 @@
 CumulativeLogger::CumulativeLogger(const std::string& name)
     : name_(name),
       lock_name_("CumulativeLoggerLock" + name),
-      lock_(lock_name_.c_str(), kDefaultMutexLevel, true) {
+      lock_(new Mutex(lock_name_.c_str(), kDefaultMutexLevel, true)) {
   Reset();
 }
 
@@ -49,7 +50,7 @@
 }
 
 void CumulativeLogger::SetName(const std::string& name) {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   name_.assign(name);
 }
 
@@ -57,19 +58,19 @@
 }
 
 void CumulativeLogger::End() {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   ++iterations_;
 }
 
 void CumulativeLogger::Reset() {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   iterations_ = 0;
   total_time_ = 0;
   STLDeleteElements(&histograms_);
 }
 
 void CumulativeLogger::AddLogger(const TimingLogger &logger) {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   TimingLogger::TimingData timing_data(logger.CalculateTimingData());
   const std::vector<TimingLogger::Timing>& timings = logger.GetTimings();
   for (size_t i = 0; i < timings.size(); ++i) {
@@ -81,12 +82,12 @@
 }
 
 size_t CumulativeLogger::GetIterations() const {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   return iterations_;
 }
 
 void CumulativeLogger::Dump(std::ostream &os) const {
-  MutexLock mu(Thread::Current(), lock_);
+  MutexLock mu(Thread::Current(), *GetLock());
   DumpHistogram(os);
 }
 
diff --git a/runtime/base/timing_logger.h b/runtime/base/timing_logger.h
index a8a6701..974a14d 100644
--- a/runtime/base/timing_logger.h
+++ b/runtime/base/timing_logger.h
@@ -18,10 +18,11 @@
 #define ART_RUNTIME_BASE_TIMING_LOGGER_H_
 
 #include "base/histogram.h"
+#include "base/locks.h"
 #include "base/macros.h"
-#include "base/mutex.h"
 #include "base/time_utils.h"
 
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
@@ -34,17 +35,17 @@
   explicit CumulativeLogger(const std::string& name);
   ~CumulativeLogger();
   void Start();
-  void End() REQUIRES(!lock_);
-  void Reset() REQUIRES(!lock_);
-  void Dump(std::ostream& os) const REQUIRES(!lock_);
+  void End() REQUIRES(!GetLock());
+  void Reset() REQUIRES(!GetLock());
+  void Dump(std::ostream& os) const REQUIRES(!GetLock());
   uint64_t GetTotalNs() const {
     return GetTotalTime() * kAdjust;
   }
   // Allow the name to be modified, particularly when the cumulative logger is a field within a
   // parent class that is unable to determine the "name" of a sub-class.
-  void SetName(const std::string& name) REQUIRES(!lock_);
-  void AddLogger(const TimingLogger& logger) REQUIRES(!lock_);
-  size_t GetIterations() const REQUIRES(!lock_);
+  void SetName(const std::string& name) REQUIRES(!GetLock());
+  void AddLogger(const TimingLogger& logger) REQUIRES(!GetLock());
+  size_t GetIterations() const REQUIRES(!GetLock());
 
  private:
   class HistogramComparator {
@@ -58,18 +59,22 @@
   static constexpr size_t kDefaultBucketCount = 100;
   static constexpr size_t kInitialBucketSize = 50;  // 50 microseconds.
 
-  void AddPair(const std::string &label, uint64_t delta_time)
-      REQUIRES(lock_);
-  void DumpHistogram(std::ostream &os) const REQUIRES(lock_);
+  void AddPair(const std::string &label, uint64_t delta_time) REQUIRES(GetLock());
+  void DumpHistogram(std::ostream &os) const REQUIRES(GetLock());
   uint64_t GetTotalTime() const {
     return total_time_;
   }
+
+  Mutex* GetLock() const {
+    return lock_.get();
+  }
+
   static const uint64_t kAdjust = 1000;
-  std::set<Histogram<uint64_t>*, HistogramComparator> histograms_ GUARDED_BY(lock_);
+  std::set<Histogram<uint64_t>*, HistogramComparator> histograms_ GUARDED_BY(GetLock());
   std::string name_;
   const std::string lock_name_;
-  mutable Mutex lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
-  size_t iterations_ GUARDED_BY(lock_);
+  mutable std::unique_ptr<Mutex> lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
+  size_t iterations_ GUARDED_BY(GetLock());
   uint64_t total_time_;
 
   DISALLOW_COPY_AND_ASSIGN(CumulativeLogger);