[GeometryInterface] Add rotate*(), rotateFromVector*() function.

third_party/WebKit/Source/core/dom/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/dom/DOMMatrix.h"
 
 namespace blink {
 
 DOMMatrix* DOMMatrix::create(ExceptionState& exceptionState) {
   return new DOMMatrix(TransformationMatrix());
@@ skipping 165 matching lines @@
   return this;
 }
 
 DOMMatrix* DOMMatrix::scale3dSelf(double scale,
                                   double ox,
                                   double oy,
                                   double oz) {
   return scaleSelf(scale, scale, scale, ox, oy, oz);
 }
 
+DOMMatrix* DOMMatrix::rotateSelf(double rotX) {
+  return rotateSelf(0, 0, rotX);
+}
+
+DOMMatrix* DOMMatrix::rotateSelf(double rotX, double rotY) {
+  return rotateSelf(rotX, rotY, 0);
+}
+
+DOMMatrix* DOMMatrix::rotateSelf(double rotX, double rotY, double rotZ) {
+  if (rotZ)
+    m_matrix->rotate3d(0, 0, 1, rotZ);
+
+  if (rotY) {
+    m_matrix->rotate3d(0, 1, 0, rotY);
+    m_is2D = false;
+  }
+
+  if (rotX) {
+    m_matrix->rotate3d(1, 0, 0, rotX);
+    m_is2D = false;
+  }
+
+  return this;
+}
+
+DOMMatrix* DOMMatrix::rotateFromVectorSelf(double x, double y) {
+  m_matrix->rotate(rad2deg(atan2(y, x)));
+  return this;
+}
+
 DOMMatrix* DOMMatrix::rotateAxisAngleSelf(double x,
                                           double y,
                                           double z,
                                           double angle) {
   m_matrix->rotate3d(x, y, z, angle);
 
   if (x != 0 || y != 0)
     m_is2D = false;
 
   return this;
@@ skipping 13 matching lines @@
   if (m_matrix->isInvertible()) {
     m_matrix = TransformationMatrix::create(m_matrix->inverse());
   } else {
     setNAN();
     setIs2D(false);
   }
   return this;
 }
 
 }  // namespace blink