Update V8 in Chromium to version 1.2.6.

This fixes a number of issue, and provides some additional support and fixes needed for the dev tools.
Review URL: http://codereview.chromium.org/115921

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17181 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -29,7 +29,7 @@ deps = {
     "http://gyp.googlecode.com/svn/trunk@501",
 
   "src/v8":
-    "http://v8.googlecode.com/svn/trunk@2055",
+    "http://v8.googlecode.com/svn/trunk@2080",
 
   "src/third_party/skia":
     "http://skia.googlecode.com/svn/trunk@171",