Move some paint-related tests to NeverFixTests

The moved tests are always expected to fail due to stack-space issues
or incompatible test flags. Also update the comment as to what belongs
in NeverFixTests.

Two tests that were in NeverFixTests are just Slow now, so re-enable them.

R=dpranke@chromium.org
BUG=381840,601669,646528

Review-Url: https://codereview.chromium.org/2334893002
Cr-Commit-Position: refs/heads/master@{#418862}

third_party/WebKit/LayoutTests/NeverFixTests

@@ -4,6 +4,7 @@
 #   2. Tests enabled by chromium embedders (e.g. Opera).
 #   3. Tests that apply to some platforms but not others.
 #   4. Tests that are too slow in Debug and so we only want to skip them in Debug.
+#   5. Tests that crash due to resource limitations on some platforms or in Debug.
 
 # FIXME: Remove the WontFix keyword and have that be implied. That way, people won't abuse
 # WontFix outside of this file.
@@ -165,11 +166,12 @@ crbug.com/7482 [ Win Mac ] http/tests/misc/timer-vs-loading.html [ WontFix ]
 crbug.com/551843 [ Linux ] fast/text/fallback-traits-fixup.html [ WontFix ]
 crbug.com/551843 [ Linux Win ] fast/text/emoji-font-weight-mac.html [ WontFix ]
 
-# These tests are too slow with our MESA backend.  We can re-enable when we have
-# bots running tests on real hardware. Don't want to just delete these because they
-# pass in the virtual test suite version.
-webkit.org/b/49629 compositing/lots-of-img-layers.html [ WontFix ]
-webkit.org/b/49629 compositing/lots-of-img-layers-with-opacity.html [ WontFix ]
+# prefer_compositing_to_lcd_text causes things to get composited regardless of their opaqueness, causing the test to fail
+crbug.com/381840 virtual/prefer_compositing_to_lcd_text/compositing/overflow/overflow-scroll-background-opaque-to-transparent.html [ WontFix ]
+crbug.com/381840 virtual/prefer_compositing_to_lcd_text/compositing/overflow/overflow-scroll-background-transparent-to-opaque.html [ WontFix ]
+
+# Stack overflow crashes on Win
+crbug.com/601669 [ Win ] svg/as-image/svg-nested.html [ WontFix ]
 
 # Only Windows supports Symbol CMAP encoded fonts.
 crbug.com/627953 [ Android Linux Mac ] fast/text/symbol-cmap.html [ WontFix ]

third_party/WebKit/LayoutTests/SlowTests

@@ -303,3 +303,9 @@ crbug.com/606649 fast/dom/gc-dom-tree-lifetime.html [ Slow ]
 
 crbug.com/647192 fast/css3-text/css3-word-break/word-break-all-ascii.html [ Slow ]
 crbug.com/647192 virtual/mojo-loading/webexposed/global-interface-listing.html [ Slow ]
+
+# These tests are slow with our MESA backend. They may be less slow when we have
+# bots running tests on real hardware or maybe when using SwiftShader.
+crbug.com/646528 compositing/lots-of-img-layers.html [ Slow ]
+crbug.com/646528 compositing/lots-of-img-layers-with-opacity.html [ Slow ]
+

third_party/WebKit/LayoutTests/StaleTestExpectations

@@ -8,8 +8,3 @@
 # would let us differentiate test_shell and WebKit DumpTreeNode.
 crbug.com/7482 [ Win Mac ] http/tests/misc/timer-vs-loading.html [ WontFix ]
 
-# These tests are too slow with our MESA backend.  We can re-enable when we have
-# bots running tests on real hardware. Don't want to just delete these because they
-# pass in the virtual test suite version.
-webkit.org/b/49629 compositing/lots-of-img-layers.html [ WontFix ]
-webkit.org/b/49629 compositing/lots-of-img-layers-with-opacity.html [ WontFix ]

third_party/WebKit/LayoutTests/TestExpectations

@@ -47,10 +47,6 @@ crbug.com/605812 [ Mac ] virtual/spv2/fast/overflow/overflow-height-float-not-re
 
 crbug.com/309675 compositing/gestures/gesture-tapHighlight-simple-longPress.html [ Failure ]
 
-# TODO(schenney) Move to NeverFixTests
-crbug.com/381840 virtual/prefer_compositing_to_lcd_text/compositing/overflow/overflow-scroll-background-opaque-to-transparent.html [ Failure ]
-crbug.com/381840 virtual/prefer_compositing_to_lcd_text/compositing/overflow/overflow-scroll-background-transparent-to-opaque.html [ Failure ]
-
 crbug.com/484370 [ Win Debug ] svg/custom/gradient-userSpaceOnUse-with-percentage.svg [ Failure ]
 
 crbug.com/504613 crbug.com/524248 paint/images/image-backgrounds-not-antialiased.html [ Skip ]
@@ -65,8 +61,6 @@ crbug.com/591500 [ Win10 ] compositing/squashing/squashing-print.html [ Failure
 crbug.com/598051 paint/invalidation/svg/absolute-sized-content-with-resources.xhtml [ Skip ]
 crbug.com/598051 svg/zoom/page/zoom-foreignObject.svg [ Skip ]
 
-crbug.com/601669 [ Win ] svg/as-image/svg-nested.html [ Crash Pass ]
-
 crbug.com/602110 hittesting/border-hittest-with-image-fallback.html [ Failure ]
 
 crbug.com/606302 [ Win7 Debug ] compositing/perpendicular-layer-sorting.html [ Failure ]