Test shell crashed while running layout tests due to an STL vector iterator getting accessed after it was invalidated.
Test shell crashed while running layout tests due to an STL vector iterator getting accessed
after it was invalidated.

This should fix the embed-tag.html and object-embed-tag.html layout test failures.

TBR=jam

Review URL: http://codereview.chromium.org/174598

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@24598 0039d316-1c4b-4281-b951-d872f2087c98

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