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

src/runtime/runtime-debug.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/accessors.h"
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/debug.h"
@@ skipping 1183 matching lines @@
         nested_scope_chain_.Add(scope_info);
       }
     } else {
       // Reparse the code and analyze the scopes.
       Handle<Script> script(Script::cast(shared_info->script()));
       Scope* scope = NULL;
 
       // Check whether we are in global, eval or function code.
       Handle<ScopeInfo> scope_info(shared_info->scope_info());
       Zone zone;
-      ParseInfo info(&zone);
       if (scope_info->scope_type() != FUNCTION_SCOPE &&
           scope_info->scope_type() != ARROW_SCOPE) {
         // Global or eval code.
-        info.InitializeFromScript(script);
+        ParseInfo info(&zone, script);
         if (scope_info->scope_type() == SCRIPT_SCOPE) {
           info.set_global();
         } else {
           DCHECK(scope_info->scope_type() == EVAL_SCOPE);
           info.set_eval();
           info.set_context(Handle<Context>(function_->context()));
         }
         if (Parser::ParseStatic(&info) && Scope::Analyze(&info)) {
           scope = info.function()->scope();
         }
         RetrieveScopeChain(scope, shared_info);
       } else {
         // Function code
-        info.InitializeFromSharedFunctionInfo(shared_info);
+        ParseInfo info(&zone, shared_info);
         if (Parser::ParseStatic(&info) && Scope::Analyze(&info)) {
           scope = info.function()->scope();
         }
         RetrieveScopeChain(scope, shared_info);
       }
     }
   }
 
   ScopeIterator(Isolate* isolate, Handle<JSFunction> function)
       : isolate_(isolate),
@@ skipping 1579 matching lines @@
   return Smi::FromInt(isolate->debug()->is_active());
 }
 
 
 RUNTIME_FUNCTION(Runtime_DebugBreakInOptimizedCode) {
   UNIMPLEMENTED();
   return NULL;
 }
 }
 }  // namespace v8::internal