Oilpan: prevent player from accessing its media element during finalization

LayoutTests/OilpanExpectations

Index: LayoutTests/OilpanExpectations
diff --git a/LayoutTests/OilpanExpectations b/LayoutTests/OilpanExpectations
index b19a60834d10d608009b97a9bd5cd749fc233ace..7d76996f95deae13685c67bfed0e5d7665a3974e 100644
--- a/LayoutTests/OilpanExpectations
+++ b/LayoutTests/OilpanExpectations
@@ -20,7 +20,7 @@ crbug.com/342574 [ Mac Debug ] fast/css-generated-content/crash-selection-editin
 crbug.com/350316 [ Linux Win Debug ] http/tests/eventsource/workers/eventsource-simple.html [ Crash ]
 crbug.com/350316 [ Mac Debug ] http/tests/eventsource/workers/eventsource-simple.html [ Timeout ]
 
-# While moving object onto the oilpan heap the timing changed such that the order in which 
+# While moving object onto the oilpan heap the timing changed such that the order in which
 # scrollbars are added to an iframe has changed.
 crbug.com/345655 compositing/iframes/scrolling-iframe.html [ Failure ]
 crbug.com/345655 virtual/softwarecompositing/iframes/scrolling-iframe.html [ Failure ]
@@ -54,6 +54,3 @@ Bug(alph) [ Win ] virtual/windows-directwrite/fast/text/orientation-sideways.htm
 crbug.com/377567 [ Debug ] editing/selection/extend-selection-character.html [ Timeout Pass ]
 crbug.com/377567 [ Debug ] editing/selection/programmatic-selection-on-mac-is-directionless.html [ Timeout Pass ]
 crbug.com/377567 [ Debug ] fast/css/large-list-of-rules-crash.html [ Timeout Pass ]
-crbug.com/377567 [ Debug ] http/tests/media/media-source/mediasource-closed-on-htmlmediaelement-destruction.html [ Timeout Pass ]
-crbug.com/377567 [ Debug ] media/audio-delete-while-slider-thumb-clicked.html [ Timeout Pass ]
-crbug.com/377567 [ Debug ] media/track/track-removal-crash.html [ Timeout Pass ]