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

ui/ozone/platform/drm/gpu/overlay_plane.cc

 // 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 "ui/ozone/platform/drm/gpu/overlay_plane.h"
 
 #include <stddef.h>
 
 #include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
 
 namespace ui {
 
 OverlayPlane::OverlayPlane(const scoped_refptr<ScanoutBuffer>& buffer)
     : buffer(buffer),
       plane_transform(gfx::OVERLAY_TRANSFORM_INVALID),
       display_bounds(gfx::Point(), buffer->GetSize()),
       crop_rect(0, 0, 1, 1) {}
 
 OverlayPlane::OverlayPlane(const scoped_refptr<ScanoutBuffer>& buffer,
                            int z_order,
                            gfx::OverlayTransform plane_transform,
                            const gfx::Rect& display_bounds,
                            const gfx::RectF& crop_rect)
     : buffer(buffer),
       z_order(z_order),
       plane_transform(plane_transform),
       display_bounds(display_bounds),
       crop_rect(crop_rect) {}
 
+OverlayPlane::OverlayPlane(const OverlayPlane& other) = default;
+
 OverlayPlane::~OverlayPlane() {
 }
 
 OverlayPlane::OverlayPlane(const scoped_refptr<ScanoutBuffer>& buffer,
                            int z_order,
                            gfx::OverlayTransform plane_transform,
                            const gfx::Rect& display_bounds,
                            const gfx::RectF& crop_rect,
                            const ProcessBufferCallback& processing_callback)
     : buffer(buffer),
@@ skipping 14 matching lines @@
     const OverlayPlaneList& overlays) {
   for (size_t i = 0; i < overlays.size(); ++i) {
     if (overlays[i].z_order == 0)
       return &overlays[i];
   }
 
   return nullptr;
 }
 
 }  // namespace ui