Add StoragePartition's ProtocolHandlers at URLRequestContext construction time. 
Previously they were added later which doesn't mesh with pending 
URLRequestJobFactory API changes. 

BUG=146602,161529

Review URL: https://chromiumcodereview.appspot.com/11308362

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181519 0039d316-1c4b-4281-b951-d872f2087c98
42 files changed