Mac: Fix (window modal) sheet placement when bookmark bar is present.
Mac: Fix (window modal) sheet placement when bookmark bar is present.

BUG=25754
TEST=Check placement of (window modal) sheets (e.g., Open File...) with various combinations of the following: NTP/non-NTP, bookmark bar active/not active, infobar present/not present, and also download bar present/not present.

Review URL: http://codereview.chromium.org/337019

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@30037 0039d316-1c4b-4281-b951-d872f2087c98

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