Implement scale*() methods in DOMMatrix.

Source/core/dom/DOMMatrixReadOnly.cpp

Index: Source/core/dom/DOMMatrixReadOnly.cpp
diff --git a/Source/core/dom/DOMMatrixReadOnly.cpp b/Source/core/dom/DOMMatrixReadOnly.cpp
index 9f8ab94ddeb46860f6f28db5584b2023128c1537..40de8340d88080c989cec20dd278657950403d6c 100644
--- a/Source/core/dom/DOMMatrixReadOnly.cpp
+++ b/Source/core/dom/DOMMatrixReadOnly.cpp
@@ -22,4 +22,20 @@ DOMMatrix* DOMMatrixReadOnly::translate(double tx, double ty, double tz)
     return DOMMatrix::create(this)->translateSelf(tx, ty, tz);
 }
 
+DOMMatrix* DOMMatrixReadOnly::scale(double scale, double ox, double oy)
+{
+    return DOMMatrix::create(this)->scaleSelf(scale, ox, oy);
+}
+
+DOMMatrix* DOMMatrixReadOnly::scale3d(double scale, double ox, double oy, double oz)
+{
+    return DOMMatrix::create(this)->scale3dSelf(scale, ox, oy, oz);
+}
+
+DOMMatrix* DOMMatrixReadOnly::scaleNonUniform(double sx, double sy, double sz,
+    double ox, double oy, double oz)
+{
+    return DOMMatrix::create(this)->scaleNonUniformSelf(sx, sy, sz, ox, oy, oz);
+}
+
 } // namespace blink