diff --git a/runtime/base/array_slice.h b/runtime/base/array_slice.h
index 19ad302..32283d0 100644
--- a/runtime/base/array_slice.h
+++ b/runtime/base/array_slice.h
@@ -129,6 +129,10 @@
     return element_size_;
   }
 
+  bool Contains(const T* element) const {
+    return &AtUnchecked(0) <= element && element < &AtUnchecked(size_);
+  }
+
  private:
   T& AtUnchecked(size_t index) {
     return *reinterpret_cast<T*>(reinterpret_cast<uintptr_t>(array_) + index * element_size_);
diff --git a/runtime/base/mutex.h b/runtime/base/mutex.h
index 3d7624d..a4e05bd 100644
--- a/runtime/base/mutex.h
+++ b/runtime/base/mutex.h
@@ -88,7 +88,6 @@
   kTracingUniqueMethodsLock,
   kTracingStreamingLock,
   kDeoptimizedMethodsLock,
-  kJitCodeCacheLock,
   kClassLoaderClassesLock,
   kDefaultMutexLevel,
   kMarkSweepLargeObjectLock,
@@ -99,6 +98,7 @@
   kMonitorPoolLock,
   kMethodVerifiersLock,
   kClassLinkerClassesLock,  // TODO rename.
+  kJitCodeCacheLock,
   kBreakpointLock,
   kMonitorLock,
   kMonitorListLock,