Update toNativeArray() / toRefPtrNativeArray() do not match Web IDL specification

LayoutTests/fast/canvas/script-tests/canvas-lineDash-input-sequence.js

+description("Test that setLineDash converts input argument into a Web IDL sequence");
+
+var canvas = document.createElement('canvas');
+document.body.appendChild(canvas);
+canvas.setAttribute('width', '700');
+canvas.setAttribute('height', '700');
+var ctx = canvas.getContext('2d');
+
+var arrayValues = [5, 15, 25];
+
+function createTestArray(arrayType) {
+  var array;
+  if (arrayType == Object) {
+    // Test a "sequence" (Object with length property).
+    array = {length: arrayValues.length};
+  } else {
+    array = new arrayType(arrayValues.length);
+  }
+
+  for (var i = 0; i < arrayValues.length; ++i)
+      array[i] = arrayValues[i]
+  return array;
+}
+
+var lineDash;
+var inputArray;
+function checkLineDash(testArray, shouldFail) {
+    inputArray = testArray;
+    // Reset line dash.
+    ctx.setLineDash([]);
+    // Set line dash.
+    if (shouldFail) {
+        shouldThrow("ctx.setLineDash(inputArray)", "'TypeError: Type error'");
+    } else {
+        ctx.setLineDash(inputArray);
+        lineDash = ctx.getLineDash();
+        for (var i = 0; i < arrayValues.length; ++i)
+            shouldBe("lineDash[" + i + "]", "" + arrayValues[i]);
+    }
+}
+
+var arrayTypes = [Array, Int8Array, Int16Array, Int32Array, Uint8Array, Uint16Array, Uint32Array, Float32Array, Float64Array, Uint8ClampedArray, Object];
+
+// Success cases.
+for (var i = 0; i < arrayTypes.length; ++i) {
+    debug("* Test passing a " + arrayTypes[i].name + " as input.");
+    checkLineDash(createTestArray(arrayTypes[i]), false);
+}
+
+// Failure cases.
+debug("* Test passing a Date as input.");
+checkLineDash(new Date(), true);
+debug("* Test passing a RegExp as input.");
+checkLineDash(new RegExp(), true);
+debug("* Test passing an Object without length as input.");
+checkLineDash({test: 1}, true);
+debug("* Test passing a Number as input.");
+checkLineDash(3, true);
+debug("* Test passing a String as input.");
+checkLineDash("Test", true);
+debug("* Test passing a Boolean as input.");
+checkLineDash(true, true);
+debug("* Test passing null as input.");
+checkLineDash(null, true);
+debug("* Test passing undefined as input.");
+checkLineDash(undefined, true);
+