ui: Create the gfx::QuadF class.

ui/gfx/vector2d_f.cc

 // Copyright (c) 2012 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 "ui/gfx/vector2d_f.h"
 
 #include <cmath>
 
 #include "base/stringprintf.h"
 
@@ skipping 33 matching lines @@
 
 float Vector2dF::Length() const {
   return static_cast<float>(std::sqrt(LengthSquared()));
 }
 
 void Vector2dF::Scale(float x_scale, float y_scale) {
   x_ *= x_scale;
   y_ *= y_scale;
 }
 
+double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
+  return static_cast<double>(lhs.x()) * rhs.y() -
+      static_cast<double>(lhs.y()) * rhs.x();
+}
+
+double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
+  return static_cast<double>(lhs.x()) * rhs.x() +
+      static_cast<double>(lhs.y()) * rhs.y();
+}
+
 }  // namespace gfx