Updating trunk VERSION from 2125.0 to 2126.0 and incrementing major version to 39

Cr-Commit-Position: refs/heads/master@{#290085}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290085 0039d316-1c4b-4281-b951-d872f2087c98

chrome/VERSION

-MAJOR=38
+MAJOR=39
 MINOR=0
-BUILD=2125
+BUILD=2126
 PATCH=0