Handle property name "-0" correctly for typed arrays.

test/mjsunit/harmony/typedarrays.js

Index: test/mjsunit/harmony/typedarrays.js
diff --git a/test/mjsunit/harmony/typedarrays.js b/test/mjsunit/harmony/typedarrays.js
index c70d8e5ea4b82371d7570bafdac12585885ccf6c..a2f3dccc7a11442808a4511c8ae2a98c75b2238b 100644
--- a/test/mjsunit/harmony/typedarrays.js
+++ b/test/mjsunit/harmony/typedarrays.js
@@ -500,6 +500,13 @@ function TestTypedArraysWithIllegalIndices() {
   assertEquals(10, a["-1e2"]);
   assertEquals(undefined, a[-1e2]);
 
+  a["-0"] = 256;
+  var s2 = "     -0";
+  a[s2] = 255;
+  assertEquals(undefined, a["-0"]);
+  assertEquals(255, a[s2]);
+  assertEquals(0, a[-0]);
+
   /* Chromium bug: 424619
    * a[-Infinity] = 50;
    * assertEquals(undefined, a[-Infinity]);
@@ -542,6 +549,13 @@ function TestTypedArraysWithIllegalIndicesStrict() {
   assertEquals(10, a["-1e2"]);
   assertEquals(undefined, a[-1e2]);
 
+  a["-0"] = 256;
+  var s2 = "     -0";
+  a[s2] = 255;
+  assertEquals(undefined, a["-0"]);
+  assertEquals(255, a[s2]);
+  assertEquals(0, a[-0]);
+
   /* Chromium bug: 424619
    * a[-Infinity] = 50;
    * assertEquals(undefined, a[-Infinity]);