Remove the global Strength enum class completely.

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index e810ca5f1f870586cffe3420a506a2ba0ad613e5..e4d49ca161bca65b9283d790b72db513b522bbe2 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -211,21 +211,8 @@ enum BindingFlags {
     js_array_fast_double_elements_map_index)                                   \
   V(JS_ARRAY_FAST_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map,                        \
     js_array_fast_holey_double_elements_map_index)                             \
-  V(JS_ARRAY_FAST_SMI_ELEMENTS_STRONG_MAP_INDEX, Map,                          \
-    js_array_fast_smi_elements_strong_map_index)                               \
-  V(JS_ARRAY_FAST_HOLEY_SMI_ELEMENTS_STRONG_MAP_INDEX, Map,                    \
-    js_array_fast_holey_smi_elements_strong_map_index)                         \
-  V(JS_ARRAY_FAST_ELEMENTS_STRONG_MAP_INDEX, Map,                              \
-    js_array_fast_elements_strong_map_index)                                   \
-  V(JS_ARRAY_FAST_HOLEY_ELEMENTS_STRONG_MAP_INDEX, Map,                        \
-    js_array_fast_holey_elements_strong_map_index)                             \
-  V(JS_ARRAY_FAST_DOUBLE_ELEMENTS_STRONG_MAP_INDEX, Map,                       \
-    js_array_fast_double_elements_strong_map_index)                            \
-  V(JS_ARRAY_FAST_HOLEY_DOUBLE_ELEMENTS_STRONG_MAP_INDEX, Map,                 \
-    js_array_fast_holey_double_elements_strong_map_index)                      \
   V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun)                                  \
   V(JS_MAP_MAP_INDEX, Map, js_map_map)                                         \
-  V(JS_OBJECT_STRONG_MAP_INDEX, Map, js_object_strong_map)                     \
   V(JS_SET_FUN_INDEX, JSFunction, js_set_fun)                                  \
   V(JS_SET_MAP_INDEX, Map, js_set_map)                                         \
   V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun)                        \
@@ -269,10 +256,6 @@ enum BindingFlags {
   V(STRICT_GENERATOR_FUNCTION_MAP_INDEX, Map, strict_generator_function_map)   \
   V(STRING_FUNCTION_INDEX, JSFunction, string_function)                        \
   V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map)   \
-  V(STRONG_CONSTRUCTOR_MAP_INDEX, Map, strong_constructor_map)                 \
-  V(STRONG_FUNCTION_MAP_INDEX, Map, strong_function_map)                       \
-  V(STRONG_GENERATOR_FUNCTION_MAP_INDEX, Map, strong_generator_function_map)   \
-  V(STRONG_MAP_CACHE_INDEX, Object, strong_map_cache)                          \
   V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function)                        \
   V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun)                      \
   V(UINT16X8_FUNCTION_INDEX, JSFunction, uint16x8_function)                    \
@@ -416,8 +399,6 @@ class Context: public FixedArray {
     NATIVE_CONTEXT_SLOTS,
     FIRST_WEAK_SLOT = OPTIMIZED_FUNCTIONS_LIST,
     FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_FAST_SMI_ELEMENTS_MAP_INDEX,
-    FIRST_JS_ARRAY_STRONG_MAP_SLOT =
-        JS_ARRAY_FAST_SMI_ELEMENTS_STRONG_MAP_INDEX,
 
     MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
     // This slot holds the thrown value in catch contexts.
@@ -539,34 +520,27 @@ class Context: public FixedArray {
 
   static int FunctionMapIndex(LanguageMode language_mode, FunctionKind kind) {
     if (IsGeneratorFunction(kind)) {
-      return is_strong(language_mode) ? STRONG_GENERATOR_FUNCTION_MAP_INDEX :
-             is_strict(language_mode) ? STRICT_GENERATOR_FUNCTION_MAP_INDEX
+      return is_strict(language_mode) ? STRICT_GENERATOR_FUNCTION_MAP_INDEX
                                       : SLOPPY_GENERATOR_FUNCTION_MAP_INDEX;
     }
 
     if (IsClassConstructor(kind)) {
       // Use strict function map (no own "caller" / "arguments")
-      return is_strong(language_mode) ? STRONG_CONSTRUCTOR_MAP_INDEX
-                                      : STRICT_FUNCTION_MAP_INDEX;
+      return STRICT_FUNCTION_MAP_INDEX;
     }
 
     if (IsArrowFunction(kind) || IsConciseMethod(kind) ||
         IsAccessorFunction(kind)) {
-      return is_strong(language_mode)
-                 ? STRONG_FUNCTION_MAP_INDEX
-                 : STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX;
+      return STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX;
     }
 
-    return is_strong(language_mode) ? STRONG_FUNCTION_MAP_INDEX :
-           is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
+    return is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
                                     : SLOPPY_FUNCTION_MAP_INDEX;
   }
 
-  static int ArrayMapIndex(ElementsKind elements_kind,
-                           Strength strength = Strength::WEAK) {
+  static int ArrayMapIndex(ElementsKind elements_kind) {
     DCHECK(IsFastElementsKind(elements_kind));
-    return elements_kind + (is_strong(strength) ? FIRST_JS_ARRAY_STRONG_MAP_SLOT
-                                                : FIRST_JS_ARRAY_MAP_SLOT);
+    return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
   }
 
   static const int kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize;