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

test/cctest/compiler/test-codegen-deopt.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 "test/cctest/cctest.h"
 
 #include "src/compiler/code-generator.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
@@ skipping 26 matching lines @@
   return v8::Utils::OpenHandle(
       *v8::Handle<v8::Function>::Cast(CompileRun(source)));
 }
 
 
 class DeoptCodegenTester {
  public:
   explicit DeoptCodegenTester(HandleAndZoneScope* scope, const char* src)
       : scope_(scope),
         function(NewFunction(src)),
-        parse_info(scope->main_zone()),
-        info(parse_info.InitializeFromJSFunction(function)),
+        parse_info(scope->main_zone(), function),
+        info(&parse_info),
         bailout_id(-1) {
     CHECK(Parser::ParseStatic(&parse_info));
     info.SetOptimizing(BailoutId::None(), Handle<Code>(function->code()));
     CHECK(Compiler::Analyze(&parse_info));
     CHECK(Compiler::EnsureDeoptimizationSupport(&info));
 
     DCHECK(info.shared_info()->has_deoptimization_support());
 
     graph = new (scope_->main_zone()) Graph(scope_->main_zone());
   }
@@ skipping 227 matching lines @@
   Handle<Object> result;
   bool has_pending_exception =
       !Execution::Call(isolate, t.function,
                        isolate->factory()->undefined_value(), 0, NULL,
                        false).ToHandle(&result);
   CHECK(!has_pending_exception);
   CHECK(result->SameValue(Smi::FromInt(42)));
 }
 
 #endif