Disable two WebDropTargetTest unit tests that hang on the mac valgrind bots and on my mac. BUG=21890 TEST=valgrind ui bot doesn't hang
Disable two WebDropTargetTest unit tests that hang on the mac valgrind bots and on my mac.
BUG=21890
TEST=valgrind ui bot doesn't hang

Review URL: http://codereview.chromium.org/196127

git-svn-id: http://src.chromium.org/svn/trunk/src@26245 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e03bbd1101e79881dfc324a2f826c882c0224926
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser