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/tools/testrunner/local/execution.py b/tools/testrunner/local/execution.py
index 36ce7be..5c5fbac 100644
--- a/tools/testrunner/local/execution.py
+++ b/tools/testrunner/local/execution.py
@@ -33,6 +33,7 @@
 from pool import Pool
 from . import commands
 from . import perfdata
+from . import statusfile
 from . import utils
 
 
@@ -98,6 +99,10 @@
         "--stress-opt" in self.context.mode_flags or
         "--stress-opt" in self.context.extra_flags):
       timeout *= 4
+    # FIXME(machenbach): Make this more OO. Don't expose default outcomes or
+    # the like.
+    if statusfile.IsSlow(test.outcomes or [statusfile.PASS]):
+      timeout *= 2
     if test.dependency is not None:
       dep_command = [ c.replace(test.path, test.dependency) for c in command ]
     else: