GeometryInterface: Add DOMMatrixInit and fromMatrix().

third_party/WebKit/Source/core/dom/DOMMatrix.idl

Index: third_party/WebKit/Source/core/dom/DOMMatrix.idl
diff --git a/third_party/WebKit/Source/core/dom/DOMMatrix.idl b/third_party/WebKit/Source/core/dom/DOMMatrix.idl
index 02437f35d079ccdbe88cbc634a94b6f1800fede5..c82fc22351173bc5021a5642a9074146cb5ff300 100644
--- a/third_party/WebKit/Source/core/dom/DOMMatrix.idl
+++ b/third_party/WebKit/Source/core/dom/DOMMatrix.idl
@@ -11,6 +11,8 @@
     // FIXME: Exposed=(Window,Worker)
     RuntimeEnabled=GeometryInterfaces,
 ] interface DOMMatrix : DOMMatrixReadOnly {
+    [RaisesException, NewObject] static DOMMatrix fromMatrix(optional DOMMatrixInit other);
+
     // These attributes are simple aliases for certain elements of the 4x4 matrix
     inherit attribute unrestricted double a;
     inherit attribute unrestricted double b;
@@ -38,8 +40,8 @@
 
     // FIXME: Should implement some methods (See: crbug.com/388780)
     // Mutable transform methods
-    DOMMatrix multiplySelf(DOMMatrix other);
-    DOMMatrix preMultiplySelf(DOMMatrix other);
+    [RaisesException] DOMMatrix multiplySelf(optional DOMMatrixInit other);
+    [RaisesException] DOMMatrix preMultiplySelf(optional DOMMatrixInit other);
     DOMMatrix translateSelf(unrestricted double tx,
                             unrestricted double ty,
                             optional unrestricted double tz = 0);