[compositorworker] compositor proxy mutation updates underlying layers

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

Index: third_party/WebKit/Source/core/dom/DOMMatrix.cpp
diff --git a/third_party/WebKit/Source/core/dom/DOMMatrix.cpp b/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
index 802ab17963d148fd2aba4ff7ffa03004b5cd24b2..46922eb1802a1e2124ae8cd5c68c416a4e8de863 100644
--- a/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
+++ b/third_party/WebKit/Source/core/dom/DOMMatrix.cpp
@@ -16,6 +16,12 @@ DOMMatrix* DOMMatrix::create(DOMMatrixReadOnly* other)
     return new DOMMatrix(other->matrix(), other->is2D());
 }
 
+DOMMatrix* DOMMatrix::create(const SkMatrix44& matrix)
+{
+    TransformationMatrix transformationMatrix(matrix);
+    return new DOMMatrix(transformationMatrix, transformationMatrix.isAffine());
+}
+
 DOMMatrix::DOMMatrix(const TransformationMatrix& matrix, bool is2D)
 {
     m_matrix = TransformationMatrix::create(matrix);