Remove funky 2-stage initialization of ParserInfo and an adventurous memset.

src/runtime/runtime-internal.cc

 // Copyright 2014 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/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug.h"
 #include "src/messages.h"
@@ skipping 161 matching lines @@
 
 
 RUNTIME_FUNCTION(Runtime_RenderCallSite) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
   MessageLocation location;
   isolate->ComputeLocation(&location);
   if (location.start_pos() == -1) return isolate->heap()->empty_string();
 
   Zone zone;
-  ParseInfo info(&zone);
-  if (location.function()->shared()->is_function()) {
-    info.InitializeFromJSFunction(location.function());
-  } else {
-    info.InitializeFromScript(location.script());
-  }
+  SmartPointer<ParseInfo> info(location.function()->shared()->is_function()
+                                   ? new ParseInfo(&zone, location.function())
+                                   : new ParseInfo(&zone, location.script()));
 
-  if (!Parser::ParseStatic(&info)) {
+  if (!Parser::ParseStatic(info.get())) {
     isolate->clear_pending_exception();
     return isolate->heap()->empty_string();
   }
   CallPrinter printer(isolate, &zone);
-  const char* string = printer.Print(info.function(), location.start_pos());
+  const char* string = printer.Print(info->function(), location.start_pos());
   return *isolate->factory()->NewStringFromAsciiChecked(string);
 }
 
 
 RUNTIME_FUNCTION(Runtime_GetFromCacheRT) {
   SealHandleScope shs(isolate);
   // This is only called from codegen, so checks might be more lax.
   CONVERT_ARG_CHECKED(JSFunctionResultCache, cache, 0);
   CONVERT_ARG_CHECKED(Object, key, 1);
 
@@ skipping 111 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_GetFromCache) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_SMI_ARG_CHECKED(id, 0);
   args[0] = isolate->native_context()->jsfunction_result_caches()->get(id);
   return __RT_impl_Runtime_GetFromCacheRT(args, isolate);
 }
 }
 }  // namespace v8::internal