Timeout expectations for wpt/encoding/legacy-mb-* tests

Consolidate expectations for the imported Web Platform Tests for
legacy multibyte encodings (Chinese, Japanese, Korean) which exercise
tens of thousands of code points and often time out (>30s) even when
marked as slow.

TBR=kbr@chromium.org

Bug: 805725,736056,749070
Change-Id: I12051e3c3a20730783aabb39376b55e9788450f4
Reviewed-on: https://chromium-review.googlesource.com/889538Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Commit-Queue: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532512}

third_party/WebKit/LayoutTests/TestExpectations

@@ -2831,12 +2831,14 @@ crbug.com/734762 inspector-protocol/timeline/page-frames.js [ Failure ]
 crbug.com/736255 [ Mac ] external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/flexbox/flexbox-baseline-multi-item-vert-001b.html [ Skip ]
 crbug.com/736732 virtual/enable_wasm/external/wpt/wasm/wasm_local_iframe_test.html [ Timeout Pass ]
 
-# These imported tests exercise tens of thousands of code points and generate large results. Marked slow, but still timeout.
-crbug.com/736056 [ Mac ] external/wpt/encoding/legacy-mb-japanese [ Timeout Pass ]
-crbug.com/736056 [ Mac Win7 ] external/wpt/encoding/legacy-mb-korean [ Timeout Pass ]
-crbug.com/736056 [ Mac ] external/wpt/encoding/legacy-mb-tchinese [ Timeout Pass ]
-crbug.com/736056 external/wpt/encoding/legacy-mb-japanese/iso-2022-jp/iso2022jp-encode-form-csiso2022jp.html [ Timeout ]
-crbug.com/736056 external/wpt/encoding/legacy-mb-korean/euc-kr/euckr-encode-form-errors-hangul.html [ Timeout Pass ]
+# These imported tests exercise tens of thousands of code points and generate large results. Marked slow, but still timeout (>30s).
+crbug.com/736056 external/wpt/encoding/legacy-mb-japanese [ Timeout Pass ]
+crbug.com/736056 external/wpt/encoding/legacy-mb-korean [ Timeout Pass ]
+crbug.com/736056 external/wpt/encoding/legacy-mb-tchinese [ Timeout Pass ]
+# These appeared bad enough that crbug.com/749070 disabled them entirely, but unclear if they are substantively different.
+crbug.com/736056 external/wpt/encoding/legacy-mb-korean/euc-kr/euckr-encode-href-errors-han.html [ Skip ]
+crbug.com/736056 external/wpt/encoding/legacy-mb-tchinese/big5/big5-encode-form-errors-extBa.html [ Skip ]
+crbug.com/736056 external/wpt/encoding/legacy-mb-tchinese/big5/big5-encode-form-errors-extBb.html [ Skip ]
 
 # module script lacks XHTML support
 crbug.com/717643 external/wpt/html/semantics/scripting-1/the-script-element/module/module-in-xhtml.xhtml [ Failure ]
@@ -3092,9 +3094,6 @@ crbug.com/757165 [ Win ] virtual/gpu/fast/canvas/canvas-blending-transforms.html
 crbug.com/757165 [ Win ] virtual/gpu/fast/canvas/canvas-scale-drawImage-shadow.html [ Skip ]
 crbug.com/757165 [ Win ] virtual/gpu/fast/canvas/canvas-strokeRect-alpha-shadow.html [ Skip ]
 crbug.com/757165 [ Win ] virtual/gpu/fast/canvas/image-object-in-canvas.html [ Skip ]
-crbug.com/626703 external/wpt/encoding/legacy-mb-korean/euc-kr/euckr-encode-href-errors-han.html [ Skip ]
-crbug.com/626703 external/wpt/encoding/legacy-mb-tchinese/big5/big5-encode-form-errors-extBa.html [ Skip ]
-crbug.com/626703 external/wpt/encoding/legacy-mb-tchinese/big5/big5-encode-form-errors-extBb.html [ Skip ]
 
 crbug.com/766129 svg/wicd/test-rightsizing-b.xhtml [ Failure Pass ]
 
@@ -3112,7 +3111,6 @@ crbug.com/787971 external/wpt/WebCryptoAPI/derive_bits_keys/pbkdf2.https.worker.
 # Tests occasionaly timing out (flaky) on WebKit Win7 dbg builder
 crbug.com/757955 [ Win7 Debug ] http/tests/devtools/sources/debugger-pause/pause-on-elements-panel.js [ Pass Timeout ]
 crbug.com/757955 [ Win7 ] media/color-profile-video-seek-filter.html [ Pass Timeout ]
-crbug.com/757955 [ Win7 Debug ] external/wpt/encoding/legacy-mb-japanese/shift_jis/sjis-encode-form-errors-han.html [ Pass Timeout ]
 crbug.com/757955 [ Win7 Debug ] storage/indexeddb/mozilla/cursors.html [ Pass Timeout ]
 crbug.com/757955 [ Win7 Debug ] storage/indexeddb/objectstore-cursor.html [ Pass Timeout ]
 crbug.com/757955 [ Win7 Debug ] http/tests/devtools/tracing/timeline-paint/layer-tree.js [ Pass Failure Timeout ]