Strip Interface class of most of its logic, make it all about Module exports

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 17bdcf5f0a80016b5130f54a8f5f278a363bb0ab..de48b2fea2f579df0375f44bdfa85dac6d88e4c6 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -873,15 +873,16 @@ void FullCodeGenerator::VisitFunctionDeclaration(
 
 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
   Variable* variable = declaration->proxy()->var();
+  Interface* interface = declaration->module()->interface();
   DCHECK(variable->location() == Variable::CONTEXT);
-  DCHECK(variable->interface()->IsFrozen());
+  DCHECK(interface->IsFrozen());
 
   Comment cmnt(masm_, "[ ModuleDeclaration");
   EmitDebugCheckDeclarationContext(variable);
 
   // Load instance object.
   __ LoadContext(eax, scope_->ContextChainLength(scope_->ScriptScope()));
-  __ mov(eax, ContextOperand(eax, variable->interface()->Index()));
+  __ mov(eax, ContextOperand(eax, interface->Index()));
   __ mov(eax, ContextOperand(eax, Context::EXTENSION_INDEX));
 
   // Assign it.