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

cc/playback/discardable_image_map_unittest.cc

 // Copyright 2015 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/playback/discardable_image_map.h"
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 #include "cc/base/region.h"
 #include "cc/test/fake_content_layer_client.h"
 #include "cc/test/fake_recording_source.h"
 #include "cc/test/skia_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkGraphics.h"
 #include "third_party/skia/include/core/SkImageGenerator.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 310 matching lines @@
   content_layer_client.set_bounds(visible_rect.size());
 
   skia::RefPtr<SkImage> discardable_image;
   discardable_image = CreateDiscardableImage(gfx::Size(10, 10));
 
   DiscardableImageMap image_map;
   {
     DiscardableImageMap::ScopedMetadataGenerator generator(&image_map,
                                                            visible_rect.size());
     {
-      scoped_ptr<SkPaint> paint(new SkPaint());
+      std::unique_ptr<SkPaint> paint(new SkPaint());
       generator.canvas()->saveLayer(gfx::RectToSkRect(visible_rect),
                                     paint.get());
     }
     generator.canvas()->drawImage(discardable_image.get(), 0, 0, nullptr);
     generator.canvas()->restore();
   }
 
   std::vector<PositionDrawImage> images =
       GetDiscardableImagesInRect(image_map, gfx::Rect(0, 0, 1, 1));
   EXPECT_EQ(1u, images.size());
   EXPECT_TRUE(images[0].image == discardable_image.get());
 }
 
 }  // namespace cc