Prevent accidental animations if we haven't yet done a full layout. Stab in the dark at a fix for some crashes. BUG=26979 TEST=dragging tabs over an existing window should still animate as the placeholder shifts around. Review URL: http://codereview.chromium.org/385048
Prevent accidental animations if we haven't yet done a full layout. Stab in the dark at a fix for some crashes.
BUG=26979
TEST=dragging tabs over an existing window should still animate as the placeholder shifts around.
Review URL: http://codereview.chromium.org/385048

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@31727 0039d316-1c4b-4281-b951-d872f2087c98

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