Treat zero-width collapsed borders as invisible

third_party/WebKit/Source/core/style/CollapsedBorderValue.h

Index: third_party/WebKit/Source/core/style/CollapsedBorderValue.h
diff --git a/third_party/WebKit/Source/core/style/CollapsedBorderValue.h b/third_party/WebKit/Source/core/style/CollapsedBorderValue.h
deleted file mode 100644
index a31500720696316ff84f3ef9b22626984d02d267..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/style/CollapsedBorderValue.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
- *           (C) 2000 Antti Koivisto (koivisto@kde.org)
- *           (C) 2000 Dirk Mueller (mueller@kde.org)
- * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef CollapsedBorderValue_h
-#define CollapsedBorderValue_h
-
-#include "core/style/BorderValue.h"
-#include "platform/wtf/Allocator.h"
-
-namespace blink {
-
-class CollapsedBorderValue {
-  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
-
- public:
-  CollapsedBorderValue()
-      : color_(0),
-        width_(0),
-        style_(kBorderStyleNone),
-        precedence_(kBorderPrecedenceOff),
-        transparent_(false) {}
-
-  CollapsedBorderValue(const BorderValue& border,
-                       const Color& color,
-                       EBorderPrecedence precedence)
-      : color_(color),
-        width_(border.NonZero() ? border.Width() : 0),
-        style_(border.Style()),
-        precedence_(precedence),
-        transparent_(border.IsTransparent()) {}
-
-  unsigned Width() const { return style_ > kBorderStyleHidden ? width_ : 0; }
-  EBorderStyle Style() const { return static_cast<EBorderStyle>(style_); }
-  bool Exists() const { return precedence_ != kBorderPrecedenceOff; }
-  Color GetColor() const { return color_; }
-  bool IsTransparent() const { return transparent_; }
-  EBorderPrecedence Precedence() const {
-    return static_cast<EBorderPrecedence>(precedence_);
-  }
-
-  bool IsSameIgnoringColor(const CollapsedBorderValue& o) const {
-    return Width() == o.Width() && Style() == o.Style() &&
-           Precedence() == o.Precedence();
-  }
-
-  bool VisuallyEquals(const CollapsedBorderValue& o) const {
-    if (!IsVisible() && !o.IsVisible())
-      return true;
-    return GetColor() == o.GetColor() && IsTransparent() == o.IsTransparent() &&
-           IsSameIgnoringColor(o);
-  }
-
-  bool IsVisible() const {
-    return Style() > kBorderStyleHidden && !IsTransparent() && Exists();
-  }
-
-  bool ShouldPaint(
-      const CollapsedBorderValue& table_current_border_value) const {
-    return IsVisible() && IsSameIgnoringColor(table_current_border_value);
-  }
-
- private:
-  Color color_;
-  unsigned width_ : 24;
-  unsigned style_ : 4;       // EBorderStyle
-  unsigned precedence_ : 3;  // EBorderPrecedence
-  unsigned transparent_ : 1;
-};
-
-}  // namespace blink
-
-#endif  // CollapsedBorderValue_h