[css-typed-om] add toMatrix() method in CSSTransformValue.idl

third_party/WebKit/Source/core/geometry/DOMMatrix.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/geometry/DOMMatrix.h"
 
 namespace blink {
 
 DOMMatrix* DOMMatrix::Create(ExecutionContext* execution_context,
                              ExceptionState& exception_state) {
@@ skipping 117 matching lines @@
   matrix_->SetM44(NAN);
 }
 
 DOMMatrix* DOMMatrix::multiplySelf(DOMMatrixInit& other,
                                    ExceptionState& exception_state) {
   DOMMatrix* other_matrix = DOMMatrix::fromMatrix(other, exception_state);
   if (!other_matrix) {
     DCHECK(exception_state.HadException());
     return nullptr;
   }
+  return multiplySelf(other_matrix);
+}
+
+DOMMatrix* DOMMatrix::multiplySelf(DOMMatrix* other_matrix) {
   if (!other_matrix->is2D())
     is2d_ = false;
 
   *matrix_ *= other_matrix->Matrix();
 
   return this;
 }
 
 DOMMatrix* DOMMatrix::preMultiplySelf(DOMMatrixInit& other,
                                       ExceptionState& exception_state) {
@@ skipping 127 matching lines @@
   return this;
 }
 
 DOMMatrix* DOMMatrix::setMatrixValue(const String& input_string,
                                      ExceptionState& exception_state) {
   SetMatrixValueFromString(input_string, exception_state);
   return this;
 }
 
 }  // namespace blink