Convert //cc from scoped_ptr to std::unique_ptr.

cc/blink/web_compositor_support_impl.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 "cc/blink/web_compositor_support_impl.h"
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "cc/blink/web_content_layer_impl.h"
 #include "cc/blink/web_display_item_list_impl.h"
 #include "cc/blink/web_external_texture_layer_impl.h"
 #include "cc/blink/web_image_layer_impl.h"
 #include "cc/blink/web_layer_impl.h"
 #include "cc/blink/web_scrollbar_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/software_output_device.h"
 
@@ skipping 51 matching lines @@
     int thumb_thickness,
     int track_start,
     bool is_left_side_vertical_scrollbar) {
   return new WebScrollbarLayerImpl(orientation,
                                    thumb_thickness,
                                    track_start,
                                    is_left_side_vertical_scrollbar);
 }
 
 }  // namespace cc_blink