Start using OStreams.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index cce31d936808ea871dc8ea0798b134441dc41a9d..ab9daf48f8f82fa328d589cbc35ace3a5a64c9e3 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -270,9 +270,9 @@ static Handle<Code> DoGenerateCode(Stub* stub) {
   LChunk* chunk = OptimizeGraph(builder.CreateGraph());
   Handle<Code> code = chunk->Codegen();
   if (FLAG_profile_hydrogen_code_stub_compilation) {
-    double ms = timer.Elapsed().InMillisecondsF();
-    PrintF("[Lazy compilation of %s took %0.3f ms]\n",
-           stub->GetName().get(), ms);
+    OFStream os(stdout);
+    os << "[Lazy compilation of " << stub << " took "
+       << timer.Elapsed().InMillisecondsF() << " ms]" << endl;
   }
   return code;
 }