Unskip previously failing tests

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 24854f698f189e52a4c85863cd9dc65078f3ad29..b70e43f226eb6a02168237ad05710d38fc40df9e 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -3169,15 +3169,10 @@ crbug.com/714862 [ Android ] tables/mozilla/collapsing_borders/bug41262-3.html [
 crbug.com/703533 [ Mac ] shapedetection/detection-security-test.html  [ Crash Pass Timeout ]
 
 # Sheriff failures 2017-05-11
-crbug.com/720511 [ Linux ] http/tests/misc/non-utf8-header-name.php [ Skip ]
 crbug.com/720511 [ Linux ] http/tests/security/contentSecurityPolicy/directive-parsing-03.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] http/tests/security/contentSecurityPolicy/source-list-parsing-04.html [ Failure Pass Timeout ]
-crbug.com/720511 [ Linux ] http/tests/security/document-domain-canonicalizes.html [ Failure Pass Timeout ]
-crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/misc/non-utf8-header-name.php [ Skip ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/contentSecurityPolicy/directive-parsing-03.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/contentSecurityPolicy/source-list-parsing-04.html [ Failure Pass Timeout ]
-crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/document-domain-canonicalizes.html [ Failure Pass Timeout ]
-crbug.com/720511 [ Linux ] virtual/off-main-thread-fetch/http/tests/misc/non-utf8-header-name.php [ Skip ]
 
 # Sheriff failures 2017-05-16
 crbug.com/722849 [ Win ] inspector/animation/animation-transition-setTiming-crash.html [ Failure Pass ]