Close the old browser window after SessionRestore. SessionRestore needs to know the last active browser in order to close it after the session restore. Add the call to BrowserList::SetLastActive() to accomplish this. BUG=http://www.crbug.com/12372 TEST=Crash the browser.  Open a new browser.  Click on restore.  The old browser window should close and the old session should appear in the new browser window.
Close the old browser window after SessionRestore.
SessionRestore needs to know the last active browser in order to close it after the session restore.
Add the call to BrowserList::SetLastActive() to accomplish this.
BUG=http://www.crbug.com/12372
TEST=Crash the browser.  Open a new browser.  Click on restore.  The old browser window should close and the old session should appear in the new browser window.

Review URL: http://codereview.chromium.org/113691

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@16637 0039d316-1c4b-4281-b951-d872f2087c98

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