[builtins] Implement %TypedArray%.prototype.{some,every} in the CSA

test/mjsunit/es6/typedarray-every.js

Index: test/mjsunit/es6/typedarray-every.js
diff --git a/test/mjsunit/es6/typedarray-every.js b/test/mjsunit/es6/typedarray-every.js
index 22132f32b16b54fdc6959849c907c5d4c9f92925..4ceee5f3aa578eb42c779b0b5b54a49eefd5461b 100644
--- a/test/mjsunit/es6/typedarray-every.js
+++ b/test/mjsunit/es6/typedarray-every.js
@@ -98,6 +98,20 @@ function TestTypedArrayForEach(constructor) {
   CheckTypedArrayIsNeutered(a);
   assertEquals(undefined, a[0]);
 
+  // Calling array.buffer midway can change the backing store.
+  a = new constructor(5);
+  a[0] = 42;
+  result = a.every(function (n, index, array) {
+    assertSame(a, array);
+    if (index == 2) {
+      (new constructor(array.buffer))[(index + 1) % 5] = 42;
+    } else {
+      a[(index+1)%5] = 42
+    }
+    return n == 42;
+  });
+  assertEquals(true, result);
+
   // The method must work for typed arrays created from ArrayBuffer.
   // The length of the ArrayBuffer is chosen so it is a multiple of
   // all lengths of the typed array items.