Migrate to WebNotification::iconURL in src/webkit/tools/test_shell/notification_presenter.cc
Migrate to WebNotification::iconURL in src/webkit/tools/test_shell/notification_presenter.cc

http://trac.webkit.org/changeset/57604 removed WebNotification::icon which broke the file above.

Review URL: http://codereview.chromium.org/1642012

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@44646 0039d316-1c4b-4281-b951-d872f2087c98

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