Bring the [ Pass Timeout ] expectation back for appcache-iframe-manifests.html
Bring the [ Pass Timeout ] expectation back for appcache-iframe-manifests.html

Replace [ Slow ] expectation with [ Pass Timeout ] for layout test
http/tests/inspector/appcache/appcache-iframe-manifests.html
    
BUG=311524
TBR=jsbell,yurys,alph
NOTRY=true

Review URL: https://codereview.chromium.org/169803002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@167283 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs