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 887e75fa11d33f6e28a95ce6cd9b86bc1ddceb4e..8e1eeac9a469dabdbc6d14811da50d96910a2cf1 100644
--- a/Source/core/dom/DOMMatrixReadOnly.cpp
+++ b/Source/core/dom/DOMMatrixReadOnly.cpp
@@ -20,4 +20,20 @@ bool DOMMatrixReadOnly::isIdentity() const
         && m14() == 0 && m24() == 0 && m34() == 0 && m44() == 1;
 }
 
+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