- Consolidate verbose-gc output to be a single line which can be imported easily into spreadsheets.

runtime/vm/dart_api_impl_test.cc

Index: runtime/vm/dart_api_impl_test.cc
===================================================================
--- runtime/vm/dart_api_impl_test.cc	(revision 16586)
+++ runtime/vm/dart_api_impl_test.cc	(working copy)
@@ -1305,8 +1305,7 @@
  public:
   static void CollectNewSpace(Heap::ApiCallbacks api_callbacks) {
     bool invoke_api_callbacks = (api_callbacks == Heap::kInvokeApiCallbacks);
-    Isolate::Current()->heap()->new_space_->Scavenge(invoke_api_callbacks,
-                                                     "test case");
+    Isolate::Current()->heap()->new_space_->Scavenge(invoke_api_callbacks);
   }
 };