Updating trunk VERSION from 1850.0 to 1851.0

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252383 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252383
Removing .html reference in Pepper API referenc

The index page that links to Pepper C and Pepper C++ reference
includes .html in links. I've removed this as a precautionary step.

The cache needs clearing so that we don't link to .rst in it.

To speed things up and make sure this is clean-- I'm removing .html to be safe.

NOTRY=true

Review URL: https://codereview.chromium.org/174363002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252386 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252386