Ensure that the underlying web_contents has focus in the external tab container when it receives the SetInitialFocus notification from the client. 
Ensure that the underlying web_contents has focus in the external tab container
when it receives the SetInitialFocus notification from the client. 


Review URL: http://codereview.chromium.org/102022

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@15104 0039d316-1c4b-4281-b951-d872f2087c98

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