Fix cpplint whitespace/braces issues

Change-Id: Ide80939faf8e8690d8842dde8133902ac725ed1a
diff --git a/runtime/dex_file.cc b/runtime/dex_file.cc
index 1e37dcd..cd34c3c 100644
--- a/runtime/dex_file.cc
+++ b/runtime/dex_file.cc
@@ -252,7 +252,7 @@
 
 class ScopedJniMonitorLock {
  public:
-  ScopedJniMonitorLock(JNIEnv* env, jobject locked) : env_(env), locked_(locked){
+  ScopedJniMonitorLock(JNIEnv* env, jobject locked) : env_(env), locked_(locked) {
     env->MonitorEnter(locked_);
   }
   ~ScopedJniMonitorLock() {