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diff --git a/Source/WebCore/css/WebKitCSSMatrix.cpp b/Source/WebCore/css/WebKitCSSMatrix.cpp
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+++ b/Source/WebCore/css/WebKitCSSMatrix.cpp
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+/*
+ * Copyright (C) 2008 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 APPLE INC. ``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 APPLE INC. OR
+ * CONTRIBUTORS 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 "WebKitCSSMatrix.h"
+
+#include "CSSParser.h"
+#include "CSSStyleSelector.h"
+#include "CSSMutableStyleDeclaration.h"
+#include "CSSPropertyNames.h"
+#include "CSSValueKeywords.h"
+#include "ExceptionCode.h"
+#include "RenderStyle.h"
+#include <wtf/MathExtras.h>
+
+namespace WebCore {
+
+WebKitCSSMatrix::WebKitCSSMatrix(const TransformationMatrix& m)
+    : m_matrix(m)
+{
+}
+
+WebKitCSSMatrix::WebKitCSSMatrix(const String& s, ExceptionCode& ec) 
+{
+    setMatrixValue(s, ec);
+}
+
+WebKitCSSMatrix::~WebKitCSSMatrix()
+{
+}
+
+void WebKitCSSMatrix::setMatrixValue(const String& string, ExceptionCode& ec)
+{
+    CSSParser p(true);
+    RefPtr<CSSMutableStyleDeclaration> styleDeclaration = CSSMutableStyleDeclaration::create();
+    if (p.parseValue(styleDeclaration.get(), CSSPropertyWebkitTransform, string, true)) {
+        // Convert to TransformOperations. This can fail if a property 
+        // requires style (i.e., param uses 'ems' or 'exs')
+        RefPtr<CSSValue> value = styleDeclaration->getPropertyCSSValue(CSSPropertyWebkitTransform);
+
+        // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
+        if (!value || (value->isPrimitiveValue() && (static_cast<CSSPrimitiveValue*>(value.get()))->getIdent() == CSSValueNone))
+            return;
+
+        TransformOperations operations;
+        if (!CSSStyleSelector::createTransformOperations(value.get(), 0, 0, operations)) {
+            ec = SYNTAX_ERR;
+            return;
+        }
+        
+        // Convert transform operations to a TransformationMatrix. This can fail
+        // if a param has a percentage ('%')
+        TransformationMatrix t;
+        for (unsigned i = 0; i < operations.operations().size(); ++i) {
+            if (operations.operations()[i].get()->apply(t, IntSize(0, 0))) {
+                ec = SYNTAX_ERR;
+                return;
+            }
+        }
+        
+        // set the matrix
+        m_matrix = t;
+    } else if (!string.isEmpty()) // There is something there but parsing failed
+        ec = SYNTAX_ERR;
+}
+
+// Perform a concatenation of the matrices (this * secondMatrix)
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::multiply(WebKitCSSMatrix* secondMatrix) const
+{
+    if (!secondMatrix)
+        return 0;
+
+    TransformationMatrix tmp(secondMatrix->m_matrix);
+    tmp.multiply(m_matrix);
+    return WebKitCSSMatrix::create(tmp);
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::inverse(ExceptionCode& ec) const
+{
+    if (!m_matrix.isInvertible()) {
+        ec = NOT_SUPPORTED_ERR;
+        return 0;
+    }
+    
+    return WebKitCSSMatrix::create(m_matrix.inverse());
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::translate(double x, double y, double z) const
+{
+    if (isnan(x))
+        x = 0;
+    if (isnan(y))
+        y = 0;
+    if (isnan(z))
+        z = 0;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).translate3d(x, y, z));
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::scale(double scaleX, double scaleY, double scaleZ) const
+{
+    if (isnan(scaleX))
+        scaleX = 1;
+    if (isnan(scaleY))
+        scaleY = scaleX;
+    if (isnan(scaleZ))
+        scaleZ = 1;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).scale3d(scaleX, scaleY, scaleZ));
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotate(double rotX, double rotY, double rotZ) const
+{
+    if (isnan(rotX))
+        rotX = 0;
+        
+    if (isnan(rotY) && isnan(rotZ)) {
+        rotZ = rotX;
+        rotX = 0;
+        rotY = 0;
+    }
+
+    if (isnan(rotY))
+        rotY = 0;
+    if (isnan(rotZ))
+        rotZ = 0;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(rotX, rotY, rotZ));
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::rotateAxisAngle(double x, double y, double z, double angle) const
+{
+    if (isnan(x))
+        x = 0;
+    if (isnan(y))
+        y = 0;
+    if (isnan(z))
+        z = 0;
+    if (isnan(angle))
+        angle = 0;
+    if (x == 0 && y == 0 && z == 0)
+        z = 1;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).rotate3d(x, y, z, angle));
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewX(double angle) const
+{
+    if (isnan(angle))
+        angle = 0;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewX(angle));
+}
+
+PassRefPtr<WebKitCSSMatrix> WebKitCSSMatrix::skewY(double angle) const
+{
+    if (isnan(angle))
+        angle = 0;
+    return WebKitCSSMatrix::create(TransformationMatrix(m_matrix).skewY(angle));
+}
+
+String WebKitCSSMatrix::toString() const
+{
+    // FIXME - Need to ensure valid CSS floating point values (https://bugs.webkit.org/show_bug.cgi?id=20674)
+    if (m_matrix.isAffine())
+        return String::format("matrix(%f, %f, %f, %f, %f, %f)",
+                                m_matrix.a(), m_matrix.b(), m_matrix.c(), m_matrix.d(), m_matrix.e(), m_matrix.f());
+    return String::format("matrix3d(%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %f)",
+                            m_matrix.m11(), m_matrix.m12(), m_matrix.m13(), m_matrix.m14(),
+                            m_matrix.m21(), m_matrix.m22(), m_matrix.m23(), m_matrix.m24(),
+                            m_matrix.m31(), m_matrix.m32(), m_matrix.m33(), m_matrix.m34(),
+                            m_matrix.m41(), m_matrix.m42(), m_matrix.m43(), m_matrix.m44());
+}
+
+} // namespace WebCore