Cleanup code-stub interface descriptor initialization.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/12302017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13688 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/code-stubs-ia32.cc

@@ -48,7 +48,6 @@ void KeyedLoadFastElementStub::InitializeInterfaceDescriptor(
   static Register registers[] = { edx, ecx };
   descriptor->register_param_count_ = 2;
   descriptor->register_params_ = registers;
-  descriptor->stack_parameter_count_ = NULL;
   descriptor->deoptimization_handler_ =
       FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
 }

src/isolate.cc

@@ -2016,8 +2016,6 @@ bool Isolate::Init(Deserializer* des) {
   date_cache_ = new DateCache();
   code_stub_interface_descriptors_ =
       new CodeStubInterfaceDescriptor[CodeStub::NUMBER_OF_IDS];
-  memset(code_stub_interface_descriptors_, 0,
-         kPointerSize * CodeStub::NUMBER_OF_IDS);
 
   // Enable logging before setting up the heap
   logger_->SetUp();

src/x64/code-stubs-x64.cc

@@ -45,7 +45,6 @@ void KeyedLoadFastElementStub::InitializeInterfaceDescriptor(
   static Register registers[] = { rdx, rax };
   descriptor->register_param_count_ = 2;
   descriptor->register_params_ = registers;
-  descriptor->stack_parameter_count_ = NULL;
   descriptor->deoptimization_handler_ =
       FUNCTION_ADDR(KeyedLoadIC_MissFromStubFailure);
 }