Revert 234959 "[SPDY] Reenable SPDY/2 for M32"

> [SPDY] Reenable SPDY/2 for M32
> 
> This will be merged to the M32 branch and then reverted on trunk.
> 
> BUG=318651
> R=jam@chromium.org, rch@chromium.org
> 
> Review URL: https://codereview.chromium.org/71383002

TBR=akalin@chromium.org
BUG=304955

Review URL: https://codereview.chromium.org/75413007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235898 0039d316-1c4b-4281-b951-d872f2087c98
Extension docs: Fix sample tags after Handlebar update

BUG=320656
R=kalman
NOTRY=TRUE

Review URL: https://codereview.chromium.org/62803011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235899 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235899