Reviewed by Simon Fraser

        <rdar://problem/6805928> Re-export layout test MPEG-4 file to remove unusual edit

        Use better mp4 test file for media tests. The original mp4 file had an unusual
        edit (non-zero start time) which is not supported by all media engines. The new
        movie should also give more useful pixel test results.

        * media/content/test.mp4: Update the movie.
        * media/progress-event-total-expected.txt: Update test results to match movie duration and
        content changes.
        * media/progress-event-total.html: Ditto.
        * media/video-currentTime-set-expected.txt: Ditto.
        * media/video-loop-expected.txt: Ditto.
        * platform/mac/media/video-aspect-ratio-expected.checksum: Ditto.
        * platform/mac/media/video-aspect-ratio-expected.png: Ditto.
        * platform/mac/media/video-controls-rendering-expected.checksum: Ditto.
        * platform/mac/media/video-controls-rendering-expected.png: Ditto.
        * platform/mac/media/video-display-toggle-expected.checksum: Ditto.
        * platform/mac/media/video-display-toggle-expected.png: Ditto.
        * platform/mac/media/video-empty-source-expected.checksum: Ditto.
        * platform/mac/media/video-layer-crash-expected.checksum: Ditto.
        * platform/mac/media/video-layer-crash-expected.png: Ditto.
        * platform/mac/media/video-transformed-expected.checksum: Ditto.
        * platform/mac/media/video-transformed-expected.png: Ditto.
        * platform/mac/media/video-zoom-expected.checksum: Ditto.
        * platform/mac/media/video-zoom-expected.png: Ditto.



git-svn-id: svn://svn.chromium.org/blink/trunk@42836 bbb929c8-8fbe-4397-9dbb-9b2b20218538