From 815f1ed417bd26fbe2abbdf20ac5d3423b30796c Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@nokia.com>
Date: Mon, 23 Jul 2012 09:28:44 +0200
Subject: Imported WebKit commit e65cbc5b6ac32627c797e7fc7f46eb7794410c92
 (http://svn.webkit.org/repository/webkit/trunk@123308)

New snapshot with better configure tests
---
 Source/WebCore/css/WebKitCSSKeyframeRule.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'Source/WebCore/css/WebKitCSSKeyframeRule.cpp')

diff --git a/Source/WebCore/css/WebKitCSSKeyframeRule.cpp b/Source/WebCore/css/WebKitCSSKeyframeRule.cpp
index 7692086d0..0577b46f0 100644
--- a/Source/WebCore/css/WebKitCSSKeyframeRule.cpp
+++ b/Source/WebCore/css/WebKitCSSKeyframeRule.cpp
@@ -31,6 +31,13 @@
 #include "WebKitCSSKeyframesRule.h"
 
 namespace WebCore {
+
+StylePropertySet* StyleKeyframe::mutableProperties()
+{
+    if (!m_properties->isMutable())
+        m_properties = m_properties->copy();
+    return m_properties.get();
+}
     
 void StyleKeyframe::setProperties(PassRefPtr<StylePropertySet> properties)
 {
@@ -94,7 +101,7 @@ WebKitCSSKeyframeRule::~WebKitCSSKeyframeRule()
 CSSStyleDeclaration* WebKitCSSKeyframeRule::style() const
 {
     if (!m_propertiesCSSOMWrapper)
-        m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_keyframe->properties(), const_cast<WebKitCSSKeyframeRule*>(this));
+        m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_keyframe->mutableProperties(), const_cast<WebKitCSSKeyframeRule*>(this));
     return m_propertiesCSSOMWrapper.get();
 }
 
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