Implement skew* funtion in DomMatrix & DOMMatrixReadOnly.

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

Index: third_party/WebKit/Source/core/dom/DOMMatrix.cpp
diff --git a/third_party/WebKit/Source/core/dom/DOMMatrix.cpp b/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
index 46922eb1802a1e2124ae8cd5c68c416a4e8de863..14a1d8e9641ce9a097c1a470bc8aea5bfbaccdcb 100644
--- a/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
+++ b/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
@@ -106,4 +106,16 @@ DOMMatrix* DOMMatrix::scaleNonUniformSelf(double sx, double sy, double sz,
     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