Remove baseline overrides of LayoutMenuList

They are unnecessary since crrev.com/735492.
This CL should have no behavior changes, however this updates a rendering
test for empty lines.

Bug: 1040828
Change-Id: I83c665eb2a136a98d5f9dbcc8b435964fb177c74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2024187Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735740}

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

@@ -75,23 +75,6 @@ class CORE_EXPORT LayoutMenuList final : public LayoutFlexibleBox {
 
   bool HasLineIfEmpty() const override { return true; }
 
-  // Flexbox defines baselines differently than regular blocks.
-  // For backwards compatibility, menulists need to do the regular block
-  // behavior.
-  LayoutUnit BaselinePosition(FontBaseline baseline,
-                              bool first_line,
-                              LineDirectionMode direction,
-                              LinePositionMode position) const override {
-    return LayoutBlock::BaselinePosition(baseline, first_line, direction,
-                                         position);
-  }
-  LayoutUnit FirstLineBoxBaseline() const override {
-    return LayoutBlock::FirstLineBoxBaseline();
-  }
-  LayoutUnit InlineBlockBaseline(LineDirectionMode direction) const override {
-    return LayoutBlock::InlineBlockBaseline(direction);
-  }
-
   void CreateInnerBlock();
   scoped_refptr<ComputedStyle> CreateInnerStyle();
   void UpdateInnerStyle();

third_party/blink/web_tests/fast/forms/select/menulist-appearance-basic.html

@@ -38,11 +38,13 @@ select {
 <!-- shadow -->
 <select style="box-shadow: 4px 4px 10px rgba(255,0,0,0.5), inset 4px 4px 4px rgba(0,255,0,0.5);"><option>foo</option></select> <br>
  
-<!-- font -->
+Font-size and baseline:
 <select style="font-size: 16px;"><option>foo</option></select>
 <select style="font-size: 20px;"><option>foo</option></select>
 <select style="font-size: 24px;"><option>foo</option></select>
 <select style="-webkit-appearance:menulist-button; font-weight:bold"><option>September 2016</option></select>
+<select></select>
+<select style="font-size: 24px;"></select>
 <br>
 
 <!-- zoom -->