Implement DOMMatrixReadOnly multiple and constructor functions

third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h

Index: third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
diff --git a/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h b/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
index 890990b545ff0eb4fb2c30cdf3a1ed6754b40fdf..6ed44c0fe19347edf4b213302d47509a93e0699c 100644
--- a/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
+++ b/third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.h
@@ -9,6 +9,7 @@
 #include "core/dom/DOMTypedArray.h"
 #include "platform/heap/Handle.h"
 #include "platform/transforms/TransformationMatrix.h"
+#include "wtf/Vector.h"
 #include <memory>
 
 namespace blink {
@@ -19,6 +20,8 @@ class DOMMatrixReadOnly : public GarbageCollectedFinalized<DOMMatrixReadOnly>, p
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~DOMMatrixReadOnly();
+    static DOMMatrixReadOnly* create(Vector<double>);
+    static DOMMatrixReadOnly* create(DOMMatrixReadOnly* other);
 
     double a() const { return m_matrix->m11(); }
     double b() const { return m_matrix->m12(); }
@@ -47,7 +50,7 @@ public:
     bool is2D() const;
     bool isIdentity() const;
 
-    DOMMatrix* multiply(DOMMatrix*);
+    DOMMatrixReadOnly* multiply(DOMMatrixReadOnly*);
     DOMMatrix* translate(double tx, double ty, double tz = 0);
     DOMMatrix* scale(double scale, double ox = 0, double oy = 0);
     DOMMatrix* scale3d(double scale, double ox = 0, double oy = 0, double oz = 0);
@@ -62,12 +65,17 @@ public:
     DEFINE_INLINE_TRACE() { }
 
 protected:
+    DOMMatrixReadOnly() {}
     // TransformationMatrix needs to be 16-byte aligned. PartitionAlloc
     // supports 16-byte alignment but Oilpan doesn't. So we use an std::unique_ptr
     // to allocate TransformationMatrix on PartitionAlloc.
     // TODO(oilpan): Oilpan should support 16-byte aligned allocations.
     std::unique_ptr<TransformationMatrix> m_matrix;
     bool m_is2D;
+
+private:
+    DOMMatrixReadOnly(const TransformationMatrix&, bool is2D);
+    DOMMatrixReadOnly(Vector<double> sequence);
 };
 
 } // namespace blink