Introduce a PrototypeIterator template and use it all over the place

src/objects-printer.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/jsregexp.h"
 #include "src/objects-visiting.h"
+#include "src/prototype-iterator.h"
 
 namespace v8 {
 namespace internal {
 
 #ifdef OBJECT_PRINT
 
 void Object::Print() {
   Print(stdout);
 }
 
@@ skipping 394 matching lines @@
 
 
 void JSObject::JSObjectPrint(FILE* out) {
   HeapObject::PrintHeader(out, "JSObject");
   PrintF(out, " - map = %p [", reinterpret_cast<void*>(map()));
   // Don't call GetElementsKind, its validation code can cause the printer to
   // fail when debugging.
   PrintElementsKind(out, this->map()->elements_kind());
   PrintF(out,
          "]\n - prototype = %p\n",
-         reinterpret_cast<void*>(GetPrototype()));
+         reinterpret_cast<void*>(SAFE_GET_PROTOTYPE_FAST(this)));
   PrintF(out, " {\n");
   PrintProperties(out);
   PrintTransitions(out);
   PrintElements(out);
   PrintF(out, " }\n");
 }
 
 
 void JSModule::JSModulePrint(FILE* out) {
   HeapObject::PrintHeader(out, "JSModule");
@@ skipping 819 matching lines @@
     }
   }
   PrintF(out, "\n");
 }
 
 
 #endif  // OBJECT_PRINT
 
 
 } }  // namespace v8::internal