Fixes crash in instant. The crash would occur if a malware was showing and you hit escape. The regression is the result of converting to TabContentsWrapper and not updating a set_delegate from TabContentsWrapper to TabContents.
Fixes crash in instant. The crash would occur if a malware was showing
and you hit escape. The regression is the result of converting to
TabContentsWrapper and not updating a set_delegate from
TabContentsWrapper to TabContents.

BUG=72518
TEST=none

Review URL: http://codereview.chromium.org/6523002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@74958 0039d316-1c4b-4281-b951-d872f2087c98

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