Add constructor for DOMMatrixReadOnly

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/DOMMatrix.h"
 
 namespace blink {
 
+DOMMatrixReadOnly* DOMMatrixReadOnly::create(Vector<double> sequence, ExceptionState& exceptionState)
+{
+    if (sequence.size() != 6 && sequence.size() != 16) {
+        exceptionState.throwTypeError("An invalid number sequence is specified. The sequence must contain 6 elements for 2D matrix and 16 elements for 3D matrix.");
+        return nullptr;
+    }
+    return new DOMMatrixReadOnly(sequence);
+}
+
+DOMMatrixReadOnly::DOMMatrixReadOnly(Vector<double> sequence)
+{
+    if (sequence.size() == 6) {
+        m_matrix = TransformationMatrix::create(
+            sequence[0], sequence[1], sequence[2], sequence[3],
+            sequence[4], sequence[5]);
+        m_is2D = true;
+    } else if (sequence.size() == 16) {
+        m_matrix = TransformationMatrix::create(
+            sequence[0], sequence[1], sequence[2], sequence[3],
+            sequence[4], sequence[5], sequence[6], sequence[7],
+            sequence[8], sequence[9], sequence[10], sequence[11],
+            sequence[12], sequence[13], sequence[14], sequence[15]);
+        m_is2D = false;
+    } else {
+        NOTREACHED();
+    }
+}
+
 DOMMatrixReadOnly::~DOMMatrixReadOnly()
 {
 }
 
 bool DOMMatrixReadOnly::is2D() const
 {
     return m_is2D;
 }
 
 bool DOMMatrixReadOnly::isIdentity() const
@@ skipping 45 matching lines @@
         m_matrix->m11(), m_matrix->m12(), m_matrix->m13(), m_matrix->m14(),
         m_matrix->m21(), m_matrix->m22(), m_matrix->m23(), m_matrix->m24(),
         m_matrix->m31(), m_matrix->m32(), m_matrix->m33(), m_matrix->m34(),
         m_matrix->m41(), m_matrix->m42(), m_matrix->m43(), m_matrix->m44()
     };
 
     return DOMFloat64Array::create(array, 16);
 }
 
 } // namespace blink