Fix dragged bookmark painting under Aura.
Fix dragged bookmark painting under Aura.

Pass gfx::Canvas::NO_SUBPIXEL_RENDERING when drawing these,
since subpixel rendering (which is normally on) does not
work if the drawing destination is transparent.

BUG=121651
TEST=Drag a bookmark from within a folder in the BMB. The bookmark
text should not have rendering artifacts.

Review URL: https://chromiumcodereview.appspot.com/9950111

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@130476 0039d316-1c4b-4281-b951-d872f2087c98

adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,ropik/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,ropik/chromium