Update V8 to version 4.1.0.21

This is a cherry-pick of all commits up to and including the
4.1.0.21 cherry-pick in Chromium.

Original commit message:

Version 4.1.0.21 (cherry-pick)

Merged 206e9136bde0f2b5ae8cb77afbb1e7833e5bd412

Unlink pages from the space page list after evacuation.

BUG=430201
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/953813002

Cr-Commit-Position: refs/branch-heads/4.1@{#22}
Cr-Branched-From: 2e08d2a7aa9d65d269d8c57aba82eb38a8cb0a18-refs/heads/candidates@{#25353}

---

Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/test/mjsunit/asm/int32array-unaligned.js b/test/mjsunit/asm/int32array-unaligned.js
new file mode 100644
index 0000000..698ec5e
--- /dev/null
+++ b/test/mjsunit/asm/int32array-unaligned.js
@@ -0,0 +1,43 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function Module(stdlib, foreign, heap) {
+  "use asm";
+  var MEM32 = new stdlib.Int32Array(heap);
+  function load(i) {
+    i = i|0;
+    i = MEM32[i >> 2] | 0;
+    return i;
+  }
+  function store(i, v) {
+    i = i|0;
+    v = v|0;
+    MEM32[i >> 2] = v;
+  }
+  return { load: load, store: store };
+}
+
+var m = Module(this, {}, new ArrayBuffer(1024));
+
+m.store(0, 0x12345678);
+m.store(4, -1);
+m.store(8, -1);
+for (var i = 0; i < 4; ++i) {
+  assertEquals(0x12345678, m.load(i));
+}
+for (var i = 4; i < 12; ++i) {
+  assertEquals(-1, m.load(i));
+}
+for (var j = 4; j < 8; ++j) {
+  m.store(j, 0x11223344);
+  for (var i = 0; i < 4; ++i) {
+    assertEquals(0x12345678, m.load(i));
+  }
+  for (var i = 4; i < 8; ++i) {
+    assertEquals(0x11223344, m.load(i));
+  }
+  for (var i = 8; i < 12; ++i) {
+    assertEquals(-1, m.load(i));
+  }
+}