Bug 1426199 - Re-enable more crashtests that are now passing. r=sotaro

dom/media/test/crashtests/crashtests.list

@@ -95,7 +95,7 @@ load 1291702.html
 load 1378826.html
 load 1384248.html
 load 1389304.html
-skip-if(webrender&&winWidget) load 1393272.webm # bug 1426199 for webrender
+load 1393272.webm
 load 1411322.html
 load disconnect-wrong-destination.html
 load analyser-channels-1.html

layout/base/crashtests/crashtests.list

@@ -383,7 +383,7 @@ load 629035-1.html
 load 629908-1.html
 load 635329.html
 load 636229-1.html
-skip-if(webrender&&winWidget) == 640272.html 640272-ref.html # bug 1426199 for webrender
+== 640272.html 640272-ref.html
 load 645193.html
 load 645572-1.html
 load 650475.xhtml