[turbofan] Call FastNewContextStub for function context.

src/compiler/ast-graph-builder.h

 // 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.
 
 #ifndef V8_COMPILER_AST_GRAPH_BUILDER_H_
 #define V8_COMPILER_AST_GRAPH_BUILDER_H_
 
 #include "src/ast.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/liveness-analyzer.h"
@@ skipping 231 matching lines @@
 
   // ===========================================================================
   // The following build methods all generate graph fragments and return one
   // resulting node. The operand stack height remains the same, variables and
   // other dependencies tracked by the environment might be mutated though.
 
   // Builder to create a receiver check for sloppy mode.
   Node* BuildPatchReceiverToGlobalProxy(Node* receiver);
 
   // Builders to create local function, script and block contexts.
-  Node* BuildLocalFunctionContext(Node* context);
+  Node* BuildLocalActivationContext(Node* context);
+  Node* BuildLocalFunctionContext(Scope* scope);
   Node* BuildLocalScriptContext(Scope* scope);
   Node* BuildLocalBlockContext(Scope* scope);
 
   // Builder to create an arguments object if it is used.
   Node* BuildArgumentsObject(Variable* arguments);
 
   // Builder that assigns to the {.this_function} internal variable if needed.
   Node* BuildThisFunctionVariable(Variable* this_function_var);
 
   // Builder that assigns to the {new.target} internal variable if needed.
@@ skipping 293 matching lines @@
 
   // Prepare environment to be used as loop header.
   void PrepareForLoop(BitVector* assigned, bool is_osr = false);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_AST_GRAPH_BUILDER_H_