Fixes for upload to commondatastorage.
Fixes for upload to commondatastorage.

Fix the browse URL to include a trailing '/'.

Add Publish step to PNaCl builders.

Fix Publish step such at it always uploads to "/publish"
rather than some bots uploading to "/publish/publish".

R=binji@chromium.org

Review URL: https://codereview.chromium.org/52093011

git-svn-id: 84b3587ce119b778414dcb50e18b7479aacf4f1d@959 7dad1e8b-422e-d2af-fbf5-8013b78bd812

kuscsik/naclports,binji/naclports,yeyus/naclports,Schibum/naclports,kuscsik/naclports,adlr/naclports,kosyak/naclports_samsung-smart-tv,kosyak/naclports_samsung-smart-tv,kuscsik/naclports,binji/naclports,yeyus/naclports,adlr/naclports,clchiou/naclports,adlr/naclports,kosyak/naclports_samsung-smart-tv,dtkav/naclports,kosyak/naclports_samsung-smart-tv,yeyus/naclports,dtkav/naclports,kuscsik/naclports,clchiou/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports,clchiou/naclports,kosyak/naclports_samsung-smart-tv,Schibum/naclports,binji/naclports,dtkav/naclports,binji/naclports,clchiou/naclports,adlr/naclports,Schibum/naclports,dtkav/naclports,dtkav/naclports,yeyus/naclports,Schibum/naclports,adlr/naclports,kuscsik/naclports,clchiou/naclports,Schibum/naclports,binji/naclports