Prevent being caught in a drag without the correct set up being first performed, caused by some strange context menu interactions. This doesn't fix why we're in this situation, only a band-aid for any problems it could cause. BUG=25682 TEST=clicking tabs, dragging tabs, closing tabs, anything with tabs, and the case covered in the bug to ensure there are no crashes. Review URL: http://codereview.chromium.org/355027
Prevent being caught in a drag without the correct set up being first performed, caused by some strange context menu interactions. This doesn't fix why we're in this situation, only a band-aid for any problems it could cause.
BUG=25682
TEST=clicking tabs, dragging tabs, closing tabs, anything with tabs, and the case covered in the bug to ensure there are no crashes.
Review URL: http://codereview.chromium.org/355027

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@31237 0039d316-1c4b-4281-b951-d872f2087c98

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