Implement rotate*() 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 8148ac0cbcc383a7ea3e6fbbc5d6ad46ea24756b..45250069b99bdf370a0e1f30e4554c794222c4fe 100644
--- a/Source/core/dom/DOMMatrixReadOnly.cpp
+++ b/Source/core/dom/DOMMatrixReadOnly.cpp
@@ -67,4 +67,19 @@ PassRefPtr<Float64Array> DOMMatrixReadOnly::toFloat64Array() const
     return Float64Array::create(array, 16);
 }
 
+DOMMatrix* DOMMatrixReadOnly::rotate(double angle, double ox, double oy)
+{
+    return DOMMatrix::create(this)->rotateSelf(angle, ox, oy);
+}
+
+DOMMatrix* DOMMatrixReadOnly::rotateFromVector(double x, double y)
+{
+    return DOMMatrix::create(this)->rotateFromVectorSelf(x, y);
+}
+
+DOMMatrix* DOMMatrixReadOnly::rotateAxisAngle(double x, double y, double z, double angle)
+{
+    return DOMMatrix::create(this)->rotateAxisAngleSelf(x, y, z, angle);
+}
+
 } // namespace blink