Implement skew* funtion in DomMatrix & DOMMatrixReadOnly.

third_party/WebKit/Source/core/dom/DOMMatrix.cpp

 // Copyright 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 file.
 
 #include "core/dom/DOMMatrix.h"
 
 namespace blink {
 
 DOMMatrix* DOMMatrix::create()
 {
@@ skipping 88 matching lines @@
         m_matrix->scaleNonUniform(sx, sy);
     else
         m_matrix->scale3d(sx, sy, sz);
 
     if (hasTranslation)
         translateSelf(-ox, -oy, -oz);
 
     return this;
 }
 
+DOMMatrix* DOMMatrix::skewXSelf(double sx)
+{
+    m_matrix->skewX(sx);
+    return this;
+}
+
+DOMMatrix* DOMMatrix::skewYSelf(double sy)
+{
+    m_matrix->skewY(sy);
+    return this;
+}
+
 } // namespace blink