Move src= suspend tests into SlowTests.

These should just be slow not flakily fail.

BUG=817705,694855

Change-Id: I371f57744442eebad53aea566b751df47d8b9a9e
Reviewed-on: https://chromium-review.googlesource.com/950142Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541011}

third_party/WebKit/LayoutTests/SlowTests

@@ -140,10 +140,12 @@ crbug.com/510337 cssom/cssvalue-comparison.html [ Slow ]
 
 crbug.com/680917 http/tests/devtools/audits2/ [ Slow ]
 
-# This test is intentionally SLOW as we're waiting for a connection timeout.
+# These tests are intentionally SLOW because of throttled loading.
 crbug.com/73609 http/tests/media/video-play-stall.html [ Slow ]
-# This test is intentionally SLOW because of throttled loading.
 crbug.com/73609 http/tests/media/video-preload-metadata.html [ Slow ]
+crbug.com/694855 http/tests/media/media-src-suspend-after-have-metadata.html [ Slow ]
+crbug.com/694855 http/tests/media/media-src-suspend-after-have-future-data.html [ Slow ]
+crbug.com/694855 http/tests/media/media-src-suspend-before-have-metadata.html [ Slow ]
 
 # Many of the virtual animations tests are slow.
 crbug.com/311482 virtual/threaded/animations/prefixed/keyframes-unprefixed-03.html [ Slow ]

third_party/WebKit/LayoutTests/TestExpectations

@@ -2774,10 +2774,6 @@ crbug.com/745079 external/wpt/geolocation-API/PositionOptions.https.html [ Failu
 # Sheriff failures 2017-07-03
 crbug.com/708994 http/tests/security/cross-frame-mouse-source-capabilities.html [ Timeout Pass ]
 
-# Flaky until play state changes are propogated to WebMediaPlayer in all states.
-crbug.com/694855 http/tests/media/media-src-suspend-after-have-metadata.html [ Timeout Pass ]
-crbug.com/694855 http/tests/media/media-src-suspend-after-have-future-data.html [ Timeout Pass ]
-
 crbug.com/745887 [ Mac Win ] fast/frames/sandboxed-iframe-plugins.html [ Failure Pass ]
 
 crbug.com/626703 [ Win7 ] external/wpt/domxpath/xml_xpath_runner.html [ Timeout Pass ]
@@ -3370,7 +3366,6 @@ crbug.com/817167 http/tests/devtools/oopif/oopif-cookies-refresh.js [ Failure Ti
 
 # Sheriff 2018-03-01
 crbug.com/817678 [ Win ] http/tests/devtools/console/console-group-similar.js [ Failure Pass ]
-crbug.com/817705 [ Mac Win Linux ] http/tests/media/media-src-suspend-before-have-metadata.html [ Failure Timeout Pass ]
 
 # Sheriff 2018-03-02
 crbug.com/818107 [ Android ] presentation/presentationconnectionavailableevent-ctor-mock.html [ Failure Crash ]