Remove text output from media-document-audio-repaint

The repainting in this test is correct in all cases, but due to timing
issues the actual repaint rects are not consistent from run to run or
across platforms.

Therefore, remove any text output for repaint rects and leave this as
just a pixel test.

BUG=353934,345027

Review URL: https://codereview.chromium.org/204873002

git-svn-id: svn://svn.chromium.org/blink/trunk@169576 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -927,7 +927,7 @@ crbug.com/353087 w3c/web-platform-tests/shadow-dom/elements-and-dom-objects/the-
 crbug.com/353087 w3c/web-platform-tests/shadow-dom/styles/test-012.html [ Failure ]
 crbug.com/353727 virtual/threaded/animations/keyframe-timing-functions-multiple-properties.html [ Pass Timeout ]
 crbug.com/24182 [ Win ] jquery/manipulation.html [ Pass Timeout ]
-crbug.com/353934 media/media-document-audio-repaint.html [ Pass Failure ]
+crbug.com/353934 media/media-document-audio-repaint.html [ Pass Failure NeedsRebaseline ]
 crbug.com/353736 [ Linux ] fast/forms/number/number-appearance-spinbutton-disabled-readonly.html [ Pass ImageOnlyFailure ]
 crbug.com/353736 [ Linux ] fast/forms/select/listbox-appearance-basic.html [ Pass ImageOnlyFailure ]
 crbug.com/353751 http/tests/security/contentSecurityPolicy/1.1/frame-ancestors/frame-ancestors-nested-same-in-same-none-block.html [ Pass Failure ]

third_party/WebKit/LayoutTests/media/media-document-audio-repaint.html

-<style>
-    body {
-        overflow: hidden
-    }
-    pre {
-        position: absolute;
-        top: 10000px;
-    }
-</style>
 <script src="../resources/run-after-display.js"></script>
 <script>
     if (window.testRunner)
@@ -15,7 +6,6 @@
     function onPause()
     {
         var videoElement = document.getElementById("fr").contentDocument.querySelector("video");
-        window.internals.startTrackingRepaints(document);
         runAfterDisplay(function() {
             videoElement.currentTime = videoElement.duration * 0.50;
         });
@@ -23,12 +13,6 @@
 
     function onSeeked()
     {
-        var repaintRects = window.internals.repaintRectsAsText(document);
-        var pre = document.createElement('pre');
-        document.body.appendChild(pre);
-        pre.textContent += repaintRects;
-        window.internals.stopTrackingRepaints(document);
-
         if (window.testRunner)
             testRunner.notifyDone();
     }