[CSS Grid Layout] Upgrade justify-content parsing to CSS3 Box Alignment spec.

Source/core/css/CSSContentDistributionValue.cpp

Index: Source/core/css/CSSContentDistributionValue.cpp
diff --git a/Source/core/css/CSSContentDistributionValue.cpp b/Source/core/css/CSSContentDistributionValue.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0feea22b2d2d83ee7a0264b0bfcf36b5a997a84f
--- /dev/null
+++ b/Source/core/css/CSSContentDistributionValue.cpp
@@ -0,0 +1,47 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE fil

[Julien - ping for review, 2014/10/28 17:23:05]

LICENSE fil again

[jfernandez, 2014/10/29 11:03:04]

Done.

+
+#include "config.h"
+#include "core/css/CSSContentDistributionValue.h"
+
+#include "wtf/text/StringBuilder.h"
+
+namespace blink {
+
+CSSContentDistributionValue::CSSContentDistributionValue(CSSValueID distribution, CSSValueID position, CSSValueID overflow)
+    : CSSValue(CSSContentDistributionClass)
+    , m_distribution(distribution)
+    , m_position(position)
+    , m_overflow(overflow)
+{
+}
+
+CSSContentDistributionValue::~CSSContentDistributionValue()
+{
+}
+
+String CSSContentDistributionValue::customCSSText() const
+{
+    StringBuilder result;
+    if (m_distribution != CSSValueInvalid)
+        result.append(distribution()->customCSSText());
+    if (m_position != CSSValueInvalid) {
+        if (m_distribution != CSSValueInvalid)
+            result.appendLiteral(" ");

[Julien - ping for review, 2014/10/28 17:23:05]

We could simplify this if you just used a space-separated CSSValueList
(::createSpaceSeparated()).

[jfernandez, 2014/10/29 11:03:04]

Acknowledged.

+        result.append(position()->customCSSText());

[Julien - ping for review, 2014/10/28 17:23:05]

This creates a temporary object but valueName is statically linked.

[jfernandez, 2014/10/29 11:03:04]

Done.

+    }
+    if (m_overflow != CSSValueInvalid) {
+        if (m_distribution != CSSValueInvalid || m_position != CSSValueInvalid)
+            result.appendLiteral(" ");
+        result.append(overflow()->customCSSText());
+    }
+    return result.toString();
+}
+
+bool CSSContentDistributionValue::equals(const CSSContentDistributionValue& other) const
+{
+    return m_distribution == other.m_distribution && m_position == other.m_position && m_overflow == other.m_overflow;
+}
+
+}