Remove unused has_prototype_slot parameter on FunctionMapIndex

has_prototype_slot on Context::FunctionMapIndex() is unused in its
implementation, and all callers passes just true.
Whether the function has prototype or not is determined by FunctionKind
instead.

Change-Id: I598515b25267dd3470cccbf3236b5e64c6959d00
Reviewed-on: https://chromium-review.googlesource.com/c/1469542Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59584}

src/contexts-inl.h

@@ -165,8 +165,7 @@ NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
   CHECK_FOLLOWS2(v3, v4)
 
 int Context::FunctionMapIndex(LanguageMode language_mode, FunctionKind kind,
-                              bool has_prototype_slot, bool has_shared_name,
-                              bool needs_home_object) {
+                              bool has_shared_name, bool needs_home_object) {
   if (IsClassConstructor(kind)) {
     // Like the strict function map, but with no 'name' accessor. 'name'
     // needs to be the last property and it is added during instantiation,

src/contexts.h

@@ -642,8 +642,7 @@ class Context : public HeapObject {
                                bool* is_sloppy_function_name = nullptr);
 
   static inline int FunctionMapIndex(LanguageMode language_mode,
-                                     FunctionKind kind, bool has_prototype_slot,
-                                     bool has_shared_name,
+                                     FunctionKind kind, bool has_shared_name,
                                      bool needs_home_object);
 
   static int ArrayMapIndex(ElementsKind elements_kind) {

src/objects-debug.cc

@@ -1098,7 +1098,7 @@ void SharedFunctionInfo::SharedFunctionInfoVerify(Isolate* isolate) {
   }
 
   int expected_map_index = Context::FunctionMapIndex(
-      language_mode(), kind(), true, HasSharedName(), needs_home_object());
+      language_mode(), kind(), HasSharedName(), needs_home_object());
   CHECK_EQ(expected_map_index, function_map_index());
 
   if (scope_info()->length() > 0) {

src/objects/shared-function-info-inl.h

@@ -321,7 +321,7 @@ void SharedFunctionInfo::clear_padding() {
 
 void SharedFunctionInfo::UpdateFunctionMapIndex() {
   int map_index = Context::FunctionMapIndex(
-      language_mode(), kind(), true, HasSharedName(), needs_home_object());
+      language_mode(), kind(), HasSharedName(), needs_home_object());
   set_function_map_index(map_index);
 }