Don't print signatures to avoid spaces.

Change-Id: I64340fbd08282acb0eb4142d17d37e69bba507cf
diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index f8c93cb..504c141 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -374,8 +374,8 @@
 
   void VisitInvoke(HInvoke* invoke) OVERRIDE {
     StartAttributeStream("dex_file_index") << invoke->GetDexMethodIndex();
-    StartAttributeStream("method_name")
-        << PrettyMethod(invoke->GetDexMethodIndex(), GetGraph()->GetDexFile());
+    StartAttributeStream("method_name") << PrettyMethod(
+        invoke->GetDexMethodIndex(), GetGraph()->GetDexFile(), /* with_signature */ false);
   }
 
   void VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) OVERRIDE {