Revert 261450 "Update V8 to version 3.26.5 (based on bleeding_ed..."

Failing on all bots (http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/10031)



> Update V8 to version 3.26.5 (based on bleeding_edge revision r20452).
> 
> TBR=jochen@chromium.org
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/223403002

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/222583004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261483 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -51,7 +51,7 @@ vars = {
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   "v8_branch": "trunk",
-  "v8_revision": "20459",
+  "v8_revision": "20418",
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.