Fixes for new folder option of advanced filesystem. Fix new folder button position. Disallow / in folder names. Disallow creation of folders except under Downloads. Disallow saving of files except under Downloads. Miscellaneous cleanup. BUG=chromium-os:11498 TEST=New folder button should not overlap the 'File name' label any more. Creating folders in arbitrary locations using folder names with ../../ will not work. Creating folders outside of the file shelf will not work. 
Fixes for new folder option of advanced filesystem.
Fix new folder button position.
Disallow / in folder names.
Disallow creation of folders except under Downloads.
Disallow saving of files except under Downloads.
Miscellaneous cleanup.
BUG=chromium-os:11498
TEST=New folder button should not overlap the 'File name' label any more. Creating folders in arbitrary locations using folder names with ../../ will not work. Creating folders outside of the file shelf will not work. 

Review URL: http://codereview.chromium.org/4145014

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@74218 0039d316-1c4b-4281-b951-d872f2087c98

Crystalnix/house-of-life-chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,ropik/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,Crystalnix/house-of-life-chromium,Crystalnix/house-of-life-chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,adobe/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,Crystalnix/house-of-life-chromium,ropik/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,ropik/chromium