Set our network state before setting our ready state after the media engine has initialized.
Set our network state before setting our ready state after the media engine has initialized.

This makes us consistent with other WebKit ports by ensuring we fire at least one progress event before advancing the ready state to canplay/canplaythrough.

BUG=59675
TEST=media/event-attributes.html

Review URL: http://codereview.chromium.org/7033041

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@86049 0039d316-1c4b-4281-b951-d872f2087c98

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