Stop accepting string constructor of DOMMatrix on workers

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

Index: third_party/WebKit/Source/core/geometry/DOMMatrix.idl
diff --git a/third_party/WebKit/Source/core/geometry/DOMMatrix.idl b/third_party/WebKit/Source/core/geometry/DOMMatrix.idl
index 49f6c9341a6c37d99b570a68cc04700a50790e51..7da60c0458bf22b764e43b7a5c8557d89abd2490 100644
--- a/third_party/WebKit/Source/core/geometry/DOMMatrix.idl
+++ b/third_party/WebKit/Source/core/geometry/DOMMatrix.idl
@@ -7,6 +7,7 @@
 [
     Constructor(optional (DOMString or sequence<unrestricted double>) init),
     RaisesException=Constructor,
+    ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),

[chrishtr, 2017/05/11 15:03:50]

Why not Exposed=Window and done?

[Justin Novosad, 2017/05/11 15:28:21]

Because the CanvasTransform interface[1] is exposed in Workers and it has a
dependency on DOMMatrix.

[1] https://html.spec.whatwg.org/multipage/scripting.html#canvastransform

[chrishtr, 2017/05/11 15:35:48]

Oh sorry, I meant that I thought there was a way to omit specific
constructors or methods on worker via IDL syntax. Is that possible?

[Justin Novosad, 2017/05/11 16:04:41]

Ah, right. But in this case it is a single constructor with a union arg. 
Overloads are not allowed to differ by arg type only: they must have a different
number of arguments.  Therefore, there is no way of separating the constructor
into two declarations.

     RuntimeEnabled=GeometryInterfaces,
 ] interface DOMMatrix : DOMMatrixReadOnly {