Implement serialization/deserialization of geometry interfaces

third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp

Index: third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp
diff --git a/third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp b/third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp
index 876729c9d273ea17eb17a8eaa8c750d523d9b25e..6152ca0e91ca6747b913c3808ac05d3bba81c017 100644
--- a/third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp
+++ b/third_party/WebKit/Source/core/geometry/DOMMatrixReadOnly.cpp
@@ -155,10 +155,14 @@ DOMMatrixReadOnly* DOMMatrixReadOnly::fromMatrix(
     DCHECK(exception_state.HadException());
     return nullptr;
   }
+  return fromMatrixForSerialization(other);
+}
 
+DOMMatrixReadOnly* DOMMatrixReadOnly::fromMatrixForSerialization(
+    DOMMatrixInit& other) {
   if (other.is2D()) {
-    double args[] = {other.m11(), other.m12(), other.m21(),
-                     other.m22(), other.m41(), other.m42()};
+    double args[] = {other.a(), other.b(), other.c(),
+                     other.d(), other.e(), other.f()};
     return new DOMMatrixReadOnly(args, 6);
   }