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}

---

FPIIM-449

Change-Id: I8c23c7bbb70772b4858fe8a47b64fa97ee0d1f8c
diff --git a/test/mjsunit/debug-compile-event.js b/test/mjsunit/debug-compile-event.js
index c38cd84..8623406 100644
--- a/test/mjsunit/debug-compile-event.js
+++ b/test/mjsunit/debug-compile-event.js
@@ -37,7 +37,7 @@
 var source_count = 0;  // Total number of scources compiled.
 var host_compilations = 0;  // Number of scources compiled through the API.
 var eval_compilations = 0;  // Number of scources compiled through eval.
-
+var mute_listener = false;
 
 function compileSource(source) {
   current_source = source;
@@ -45,8 +45,20 @@
   source_count++;
 }
 
+function safeEval(code) {
+  try {
+    mute_listener = true;
+    return eval('(' + code + ')');
+  } catch (e) {
+    assertEquals(void 0, e);
+    return undefined;
+  } finally {
+    mute_listener = false;
+  }
+}
 
 function listener(event, exec_state, event_data, data) {
+  if (mute_listener) return;
   try {
     if (event == Debug.DebugEvent.BeforeCompile ||
         event == Debug.DebugEvent.AfterCompile ||
@@ -81,7 +93,7 @@
       }
       // Check that script context is included into the event message.
       var json = event_data.toJSONProtocol();
-      var msg = eval('(' + json + ')');
+      var msg = safeEval(json);
       assertTrue('context' in msg.body.script);
 
       // Check that we pick script name from //# sourceURL, iff present