[turbofan] Cleanup Parameter creation in AstGraphBuilder.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index 7fb7eb67301bfa6234271c59f6711b0ab4319e1e..298b72d9514a9a3f686d38ace72176b5bdc16bfc 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -257,7 +257,7 @@ class AstGraphBuilder : public AstVisitor {
   Node* BuildPatchReceiverToGlobalProxy(Node* receiver);
 
   // Builders to create local function, script and block contexts.
-  Node* BuildLocalFunctionContext(Node* context, Node* patched_receiver);
+  Node* BuildLocalFunctionContext(Node* context);
   Node* BuildLocalScriptContext(Scope* scope);
   Node* BuildLocalBlockContext(Scope* scope);
 
@@ -435,6 +435,10 @@ class AstGraphBuilder::Environment : public ZoneObject {
   Node* Lookup(Variable* variable);
   void MarkAllLocalsLive();
 
+  // Raw operations on parameter variables.
+  void RawParameterBind(int index, Node* node);
+  Node* RawParameterLookup(int index);
+
   // Operations on the context chain.
   Node* Context() const { return contexts_.back(); }
   void PushContext(Node* context) { contexts()->push_back(context); }