Relands cl 16982 as it wasn't the cause of the build breakage. Here's
the description for that cl:

Lands http://codereview.chromium.org/115505 for bug
http://crbug.com/4030 for tyoshino.

BUG=http://crbug.com/4030
TEST=make sure control-w dismisses bookmark manager.

Review URL: http://codereview.chromium.org/113902

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16987 0039d316-1c4b-4281-b951-d872f2087c98
  virtual void ImportCanceled() {
    delete this;
  }

  virtual void ImportCanceled() {
    delete this;
  }
