Implement skew* funtion in DomMatrix & DOMMatrixReadOnly.

third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h

Index: third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
diff --git a/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h b/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
index c63802515cc07545e18a1bbfeb6f5d2b11ed0548..62c213c9a3f9eebb13d7faffa437faf288eee571 100644
--- a/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
+++ b/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
@@ -55,6 +55,8 @@ public:
     DOMMatrix* scale3d(double scale, double ox = 0, double oy = 0, double oz = 0);
     DOMMatrix* scaleNonUniform(double sx, double sy = 1, double sz = 1,
         double ox = 0, double oy = 0, double oz = 0);
+    DOMMatrix* skewX(double sx = 0);

[pdr., 2016/08/22 17:52:44]

Do you need to set a default ("= 0") here, or will "optional unrestricted double
sx = 0" in the IDL handle that?

[Hwanseung Lee, 2016/08/23 12:19:58]

Done.

+    DOMMatrix* skewY(double sy = 0);
     DOMMatrix* flipX();
     DOMMatrix* flipY();