Update V8 to version 3.23.11.

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git
 #   gclient runhooks
 # DO NOT CHECK IN CHANGES TO .DEPS.git. It will be automatically updated by
 # a bot when you modify this one.
@@ skipping 28 matching lines @@
   "ffmpeg_revision": "234251",
   "ffmpeg_hash": "0889dced5e40025c2ed0efd8e9e5e46e59d39c22",
 
   "sfntly_revision": "228",
   "lighttpd_revision": "33737",
   "skia_revision": "12355",
   "skia_hash": "52314f82ba8696e957e70eabde672b6470fedf7a",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
-  "v8_revision": "17998",
+  "v8_revision": "18041",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.
   "webrtc_revision": "5122",
   "jsoncpp_revision": "248",
   "nss_revision": "235242",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
   "swarming_revision": "e98b112accc431dd4f896d356856c0ffb53b2be2",
@@ skipping 621 matching lines @@
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
   {
     # Check for landmines (reasons to clobber the build).
     "name": "landmines",
     "pattern": ".",
     "action": ["python", "src/build/landmines.py"],
   },
 ]