Fix initializer lists to be Google C++ style.

Change-Id: Iada52ea5cf95492684033993b3299042bdaf6cee
diff --git a/src/trace.cc b/src/trace.cc
index 7b7c3eb..6b5d668 100644
--- a/src/trace.cc
+++ b/src/trace.cc
@@ -196,8 +196,8 @@
 
 static void TraceRestoreStack(Thread* self, void*) {
   struct RestoreStackVisitor : public StackVisitor {
-    RestoreStackVisitor(Thread* self) : StackVisitor(self->GetManagedStack(),
-                                                     self->GetTraceStack()), self_(self) {}
+    RestoreStackVisitor(Thread* self)
+        : StackVisitor(self->GetManagedStack(), self->GetTraceStack()), self_(self) {}
 
     virtual bool VisitFrame() {
       if (self_->IsTraceStackEmpty()) {