ui: Add out-of-line copy ctors for complex classes.

ui/gfx/geometry/cubic_bezier.h

 // 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.
 
 #ifndef UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
 #define UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
 
 #include "base/macros.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
 class GFX_EXPORT CubicBezier {
  public:
   CubicBezier(double p1x, double p1y, double p2x, double p2y);
+  CubicBezier(const CubicBezier& other);
 
   double SampleCurveX(double t) const {
     // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule.
     return ((ax_ * t + bx_) * t + cx_) * t;
   }
 
   double SampleCurveY(double t) const {
     return ((ay_ * t + by_) * t + cy_) * t;
   }
 
@@ skipping 54 matching lines @@
 
   double range_min_;
   double range_max_;
 
   DISALLOW_ASSIGN(CubicBezier);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_CUBIC_BEZIER_H_