Revert of Restore per-TypedArray-class length accessors as a perf workaround

src/js/typedarray.js

Index: src/js/typedarray.js
diff --git a/src/js/typedarray.js b/src/js/typedarray.js
index fd668a57fddceb2222d31d91ccad806dc5395bc8..b3e1c829dd62b9926a3c335f952a20a233dc22db 100644
--- a/src/js/typedarray.js
+++ b/src/js/typedarray.js
@@ -261,14 +261,6 @@
   } else {
     throw MakeTypeError(kConstructorNotFunction, "NAME")
   }
-}
-
-// TODO(littledan): Remove this performance workaround BUG(chromium:579905)
-function NAME_GetLength() {
-  if (!(%_ClassOf(this) === 'NAME')) {
-    throw MakeTypeError(kIncompatibleMethodReceiver, "NAME.length", this);
-  }
-  return %_TypedArrayGetLength(this);
 }
 
 function NAMESubArray(begin, end) {
@@ -837,9 +829,6 @@
   %AddNamedProperty(GlobalNAME.prototype,
                     "BYTES_PER_ELEMENT", ELEMENT_SIZE,
                     READ_ONLY | DONT_ENUM | DONT_DELETE);
-  // TODO(littledan): Remove this performance workaround BUG(chromium:579905)
-  utils.InstallGetter(GlobalNAME.prototype, "length", NAME_GetLength,
-                      DONT_ENUM | DONT_DELETE);
 endmacro
 
 TYPED_ARRAYS(SETUP_TYPED_ARRAY)