DevTools: unflake a few tests which constantly pass on the try bots.

third_party/WebKit/LayoutTests/TestExpectations

Index: third_party/WebKit/LayoutTests/TestExpectations
diff --git a/third_party/WebKit/LayoutTests/TestExpectations b/third_party/WebKit/LayoutTests/TestExpectations
index 3d7cb8cbe8d9d01694409b7b2b246e22708d8e50..dea783378c038df3be47c60d7687507190ee95f2 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -96,7 +96,6 @@ crbug.com/521084 animations/additive-transform-animations.html [ Pass Timeout ]
 crbug.com/521086 fast/cookies/cookies-disabled-in-data-url.html [ Crash Pass Timeout ]
 crbug.com/521089 [ Precise ] fast/preloader/image.html [ Failure Pass ]
 crbug.com/521090 [ Mac Win ] http/tests/history/post-replace-state-reload.html [ Crash Failure Pass ]
-crbug.com/521091 http/tests/inspector/elements/styles/selector-line-sourcemap-header.html [ Crash Failure Timeout Pass ]
 crbug.com/521093 http/tests/loading/pdf-commit-load-callbacks.html [ Failure Pass ]
 crbug.com/521094 [ Mac ] http/tests/navigation/beacon-cross-origin.https.html [ Crash Failure Pass ]
 crbug.com/521096 imported/wpt/webstorage/event_case_sensitive.html [ Failure Pass ]
@@ -218,7 +217,6 @@ crbug.com/569139 fast/js/string-replace-2.html [ Failure ]
 crbug.com/569139 fast/js/regexp-caching.html [ Failure ]
 crbug.com/597221 fast/dom/Window/window-postmessage-clone-deep-array.html [ Failure ]
 
-crbug.com/498539 http/tests/inspector/elements/styles/selector-line.html [ Pass Timeout ]
 crbug.com/498539 http/tests/inspector/network/network-datareceived.html [ Pass Timeout ]
 crbug.com/498539 [ Win ] inspector/tracing/decode-resize.html [ Failure Timeout ]
 crbug.com/498539 [ Win ] inspector/tracing/timeline-misc/timeline-event-dispatch.html [ Failure Pass ]
@@ -228,7 +226,6 @@ crbug.com/498539 virtual/threaded/inspector/tracing/timeline-misc/timeline-bound
 crbug.com/498539 inspector/tracing/timeline-js/timeline-injected-script-eval.html [ Pass Failure ]
 crbug.com/498539 inspector/tracing/timeline-time/timeline-time.html [ Pass Failure Timeout ]
 crbug.com/498539 inspector/tracing/timeline-time/timeline-timer.html [ Pass Failure ]
-crbug.com/498539 inspector/elements/styles-3/styles-change-node-while-editing.html [ Failure Pass ]
 crbug.com/498539 [ Mac ] inspector/sources/debugger/live-edit-no-reveal.html [ Crash Pass Timeout ]
 crbug.com/498539 [ Mac10.10 ] inspector/sources/debugger/debug-inlined-scripts-fragment-id.html [ Pass Timeout ]
 crbug.com/498539 [ Precise ] inspector/sources/debugger-step/debugger-step-over-inlined-scripts.html [ Pass Timeout ]
@@ -263,7 +260,6 @@ crbug.com/498539 [ Precise Win7 ] inspector/agents-enable-disable.html [ Crash P
 crbug.com/498539 [ Precise Win7 ] inspector/elements/styles-1/edit-inspector-stylesheet.html [ Failure Pass Timeout ]
 crbug.com/498539 crbug.com/410145 [ Release ] inspector-protocol/heap-profiler/heap-objects-tracking.html [ Crash Pass ]
 crbug.com/498539 [ Win7 Release ] inspector/elements/styles-2/perform-undo-perform-of-mergable-action.html [ Failure Pass ]
-crbug.com/498539 [ Win7 ] inspector/elements/styles-3/selector-list.html [ Failure Pass ]
 crbug.com/498539 [ Win7 Debug ] inspector/elements/styles-3/styles-computed-trace.html [ Crash Pass ]
 crbug.com/498539 [ Win7 ] inspector/elements/styles-4/styles-update-from-js.html [ Crash Pass ]