Start using OStreams.

src/typing.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/typing.h"
 
 #include "src/frames.h"
 #include "src/frames-inl.h"
 #include "src/parser.h"  // for CompileTimeValue; TODO(rossberg): should move
 #include "src/scopes.h"
@@ skipping 32 matching lines @@
   }
   RECURSE(visitor->VisitDeclarations(scope->declarations()));
   RECURSE(visitor->VisitStatements(info->function()->body()));
 }
 
 #undef RECURSE
 
 
 #ifdef OBJECT_PRINT
   static void PrintObserved(Variable* var, Object* value, Type* type) {
-    PrintF("  observed %s ", var->IsParameter() ? "param" : "local");
+    OFStream os(stdout);
+    os << "  observed " << (var->IsParameter() ? "param" : "local") << "  ";
     var->name()->Print();
-    PrintF(" : ");
+    os << " : ";
     value->ShortPrint();
-    PrintF(" -> ");
-    type->TypePrint();
+    os << " -> ";
+    type->PrintTo(os);
+    os << endl;
   }
 #endif  // OBJECT_PRINT
 
 
 Effect AstTyper::ObservedOnStack(Object* value) {
   Type* lower = Type::NowOf(value, zone());
   return Effect(Bounds(lower, Type::Any(zone())));
 }
 
 
@@ skipping 704 matching lines @@
 void AstTyper::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
 void AstTyper::VisitModuleStatement(ModuleStatement* stmt) {
   RECURSE(Visit(stmt->body()));
 }
 
 
 } }  // namespace v8::internal