[DevTools] Better label for async function call stacks

third_party/WebKit/LayoutTests/TestExpectations

 # Intentional failures to test the layout test system.
 Bug(intentional) [ Android Linux Win Mac10.10 Mac10.11 Retina ] harness-tests/crash.html [ Crash ]
 crbug.com/644303 [ Mac10.9 ] harness-tests/crash.html [ Crash Timeout ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # ====== Oilpan-only failures from here ======
 # Most of these actually cause the tests to report success, rather than
 # failure. Expected outputs will be adjusted for the better once Oilpan
 # has been well and truly enabled always.
 
@@ skipping 559 matching lines @@
 crbug.com/617785 fast/borders/block-mask-overlay-image-outset.html [ Skip ]
 
 # Either "combo" or split should run: http://testthewebforward.org/docs/css-naming.html
 crbug.com/410320 imported/csswg-test/css-writing-modes-3/orthogonal-parent-shrink-to-fit-001.html [ Skip ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/text-orientation-script-001.html [ Skip ]
 
 # These tests pass but images do not match because of wrong half-leading in vertical-lr
 crbug.com/537080 imported/csswg-test/css-writing-modes-3/vertical-alignment-003.xht [ Failure ]
 crbug.com/537080 imported/csswg-test/css-writing-modes-3/vertical-alignment-009.xht [ Failure ]
 
-# These tests fail / timeout until https://www.chromestatus.com/features/5643236399906816 ships
-crbug.com/621515 inspector/sources/debugger-async/async-await/async-callstack-async-await1.html [ Skip ]
-crbug.com/621515 inspector/sources/debugger-async/async-await/async-callstack-async-await2.html [ Skip ]
-crbug.com/621515 inspector/sources/debugger-async/async-await/async-callstack-async-await3.html [ Skip ]
-crbug.com/621515 inspector/sources/debugger-async/async-await/async-pause-on-exception.html [ Skip ]
-
 # These tests pass but images do not match because of position: absolute in vertical flow bug
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/block-flow-direction-vrl-009.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vlr-003.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vlr-005.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vlr-007.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vlr-009.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vrl-002.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vrl-004.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vrl-006.xht [ Failure ]
 crbug.com/492664 imported/csswg-test/css-writing-modes-3/clip-rect-vrl-008.xht [ Failure ]
@@ skipping 680 matching lines @@
 crbug.com/655458 imported/wpt/workers/semantics/navigation/002.html [ Failure Timeout ]
 crbug.com/655458 imported/wpt/workers/semantics/reporting-errors/004.html [ Failure Timeout ]
 crbug.com/655458 imported/wpt/workers/semantics/xhr/002.html [ Failure Timeout ]
 crbug.com/655458 imported/wpt/workers/semantics/xhr/004.html [ Failure Timeout ]
 
 crbug.com/655458 imported/wpt/workers/semantics/structured-clone/dedicated.html [ Crash Failure Timeout ]
 crbug.com/655458 imported/wpt/workers/semantics/structured-clone/shared.html [ Crash Failure Timeout ]
 
 # Web platform tests for the service workers cannot work without --enable-wptserve.
 crbug.com/602693 imported/wpt/service-workers [ Skip ]