Remove several JSFunction delegator functions.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index bd0268f5a96a98bce30a3b8f03770d8031afd150..b777c4fe6a3648830bb211ad2451c8aa9cbffecd 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6829,6 +6829,9 @@ class SharedFunctionInfo: public HeapObject {
   // Source size of this function.
   int SourceSize();
 
+  // Returns `false` if formal parameters include rest parameters, optional
+  // parameters, or destructuring parameters.
+  // TODO(caitp): make this a flag set during parsing
   inline bool has_simple_parameters();
 
   // Initialize a SharedFunctionInfo from a parsed function literal.
@@ -7225,18 +7228,9 @@ class JSFunction: public JSObject {
   inline void set_code_no_write_barrier(Code* code);
   inline void ReplaceCode(Code* code);
 
-  // Tells whether this function is builtin.
-  inline bool IsBuiltin();
-
   // Tells whether this function inlines the given shared function info.
   bool Inlines(SharedFunctionInfo* candidate);
 
-  // Tells whether this function should be subject to debugging.
-  inline bool IsSubjectToDebugging();
-
-  // Tells whether or not the function needs arguments adaption.
-  inline bool NeedsArgumentsAdaption();
-
   // Tells whether or not this function has been optimized.
   inline bool IsOptimized();
 
@@ -7345,25 +7339,9 @@ class JSFunction: public JSObject {
   // [[Construct]] from this function will not be allowed.
   bool RemovePrototype();
 
-  // Accessor for this function's initial map's [[class]]
-  // property. This is primarily used by ECMA native functions.  This
-  // method sets the class_name field of this function's initial map
-  // to a given value. It creates an initial map if this function does
-  // not have one. Note that this method does not copy the initial map
-  // if it has one already, but simply replaces it with the new value.
-  // Instances created afterwards will have a map whose [[class]] is
-  // set to 'value', but there is no guarantees on instances created
-  // before.
-  void SetInstanceClassName(String* name);
-
   // Returns if this function has been compiled to native code yet.
   inline bool is_compiled();
 
-  // Returns `false` if formal parameters include rest parameters, optional
-  // parameters, or destructuring parameters.
-  // TODO(caitp): make this a flag set during parsing
-  inline bool has_simple_parameters();
-
   // [next_function_link]: Links functions into various lists, e.g. the list
   // of optimized functions hanging off the native_context. The CodeFlusher
   // uses this link to chain together flushing candidates. Treated weakly