[LayoutNG] Strip the front spaces after LayoutNGMarker

While ComputeInlinePreferredLogicalWidths ignore spaces after
LayoutNGMarker.

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: I9ced3a959c6f89412c82686ffe2fcee4f141737e
Reviewed-on: https://chromium-review.googlesource.com/1102284
Commit-Queue: cathie chen <cathiechen@tencent.com>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568771}

third_party/WebKit/LayoutTests/FlagExpectations/enable-blink-features=LayoutNG

@@ -535,7 +535,6 @@ crbug.com/591099 fast/lists/003-vertical.html [ Failure ]
 crbug.com/591099 fast/lists/003.html [ Failure ]
 crbug.com/591099 fast/lists/004.html [ Failure ]
 crbug.com/591099 fast/lists/009-vertical.html [ Failure ]
-crbug.com/591099 fast/lists/calc-width-with-space.html [ Failure ]
 crbug.com/591099 fast/lists/inline-before-content-after-list-marker.html [ Failure ]
 crbug.com/591099 fast/lists/list-item-line-height.html [ Failure ]
 crbug.com/591099 fast/lists/marker-before-empty-inline.html [ Failure ]

third_party/blink/renderer/core/layout/layout_block_flow_line.cc

@@ -1884,7 +1884,7 @@ void LayoutBlockFlow::ComputeInlinePreferredLogicalWidths(
       }
 
       // Ignore spaces after a list marker.
-      if (child->IsListMarker())
+      if (child->IsListMarkerIncludingNG())
         strip_front_spaces = true;
     } else {
       min_logical_width = std::max(min_logical_width, inline_min);

third_party/blink/renderer/core/layout/layout_object.h

@@ -1601,6 +1601,10 @@ class CORE_EXPORT LayoutObject : public ImageResourceObserver,
     return IsListItem() || IsLayoutNGListItem();
   }
 
+  bool IsListMarkerIncludingNG() const {
+    return IsListMarker() || IsLayoutNGListMarker();
+  }
+
   virtual bool IsCombineText() const { return false; }
 
   virtual int CaretMinOffset() const;