[builtins] Delete unused ArrayIdToTypeAndSize and ArrayId.

These aren't used thanks to new implementation in CSA.

BUG=v8:5977

Change-Id: Ia4acfa0d1a925eba305a818913cbeff479b27792
Reviewed-on: https://chromium-review.googlesource.com/458477
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44151}

src/runtime/runtime-typedarray.cc

@@ -78,25 +78,6 @@ RUNTIME_FUNCTION(Runtime_TypedArrayCopyElements) {
   return CopyElements(isolate, holder, source, length);
 }
 
-void Runtime::ArrayIdToTypeAndSize(int arrayId, ExternalArrayType* array_type,
-                                   ElementsKind* fixed_elements_kind,
-                                   size_t* element_size) {
-  switch (arrayId) {
-#define ARRAY_ID_CASE(Type, type, TYPE, ctype, size)      \
-  case ARRAY_ID_##TYPE:                                   \
-    *array_type = kExternal##Type##Array;                 \
-    *fixed_elements_kind = TYPE##_ELEMENTS;               \
-    *element_size = size;                                 \
-    break;
-
-    TYPED_ARRAYS(ARRAY_ID_CASE)
-#undef ARRAY_ID_CASE
-
-    default:
-      UNREACHABLE();
-  }
-}
-
 const char* Runtime::ElementsKindToType(ElementsKind fixed_elements_kind) {
   switch (fixed_elements_kind) {
 #define ELEMENTS_KIND_CASE(Type, type, TYPE, ctype, size) \

src/runtime/runtime.h

@@ -778,25 +778,6 @@ class Runtime : public AllStatic {
       Isolate* isolate, Handle<Object> object, Handle<Object> key,
       bool* is_found_out = nullptr);
 
-  enum TypedArrayId {
-    // arrayIds below should be synchronized with typedarray.js natives.
-    ARRAY_ID_UINT8 = 1,
-    ARRAY_ID_INT8 = 2,
-    ARRAY_ID_UINT16 = 3,
-    ARRAY_ID_INT16 = 4,
-    ARRAY_ID_UINT32 = 5,
-    ARRAY_ID_INT32 = 6,
-    ARRAY_ID_FLOAT32 = 7,
-    ARRAY_ID_FLOAT64 = 8,
-    ARRAY_ID_UINT8_CLAMPED = 9,
-    ARRAY_ID_FIRST = ARRAY_ID_UINT8,
-    ARRAY_ID_LAST = ARRAY_ID_UINT8_CLAMPED
-  };
-
-  static void ArrayIdToTypeAndSize(int array_id, ExternalArrayType* type,
-                                   ElementsKind* fixed_elements_kind,
-                                   size_t* element_size);
-
   static const char* ElementsKindToType(ElementsKind fixed_elements_kind);
 
   static MaybeHandle<JSArray> GetInternalProperties(Isolate* isolate,