*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/css/CSSRegionRule.cpp

Index: Source/core/css/CSSRegionRule.cpp
diff --git a/Source/core/css/CSSRegionRule.cpp b/Source/core/css/CSSRegionRule.cpp
deleted file mode 100644
index 94e9d0bae8ce0c40cfef003d7946ca18605d0e1d..0000000000000000000000000000000000000000
--- a/Source/core/css/CSSRegionRule.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
- * Copyright (C) 2012 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer.
- * 2. Redistributions in binary form must reproduce the above
- *    copyright notice, this list of conditions and the following
- *    disclaimer in the documentation and/or other materials
- *    provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
- * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include "config.h"
-
-#include "core/css/CSSRegionRule.h"
-
-#include "RuntimeEnabledFeatures.h"
-#include "core/css/StyleRule.h"
-#include "wtf/text/StringBuilder.h"
-
-namespace WebCore {
-CSSRegionRule::CSSRegionRule(StyleRuleRegion* regionRule, CSSStyleSheet* parent)
-    : CSSGroupingRule(regionRule, parent)
-{
-    ASSERT(RuntimeEnabledFeatures::cssRegionsEnabled());
-}
-
-String CSSRegionRule::cssText() const
-{
-    StringBuilder result;
-    result.appendLiteral("@-webkit-region ");
-
-    // First add the selectors.
-    result.append(toStyleRuleRegion(m_groupRule.get())->selectorList().selectorsText());
-
-    // Then add the rules.
-    result.appendLiteral(" { \n");
-    appendCSSTextForItems(result);
-    result.append('}');
-    return result.toString();
-}
-
-} // namespace WebCore