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

cc/test/skia_common.cc

Index: cc/test/skia_common.cc
diff --git a/cc/test/skia_common.cc b/cc/test/skia_common.cc
index c237c39e9b455344ac83e628fb761ac137c8bfbb..ca9933579a29385bcc0a6624251a3cb1e7bae0c0 100644
--- a/cc/test/skia_common.cc
+++ b/cc/test/skia_common.cc
@@ -42,8 +42,8 @@ bool AreDisplayListDrawingResultsSame(const gfx::Rect& layer_rect,
                                       scoped_refptr<DisplayItemList> list_b) {
   const size_t pixel_size = 4 * layer_rect.size().GetArea();
 
-  scoped_ptr<unsigned char[]> pixels_a(new unsigned char[pixel_size]);
-  scoped_ptr<unsigned char[]> pixels_b(new unsigned char[pixel_size]);
+  std::unique_ptr<unsigned char[]> pixels_a(new unsigned char[pixel_size]);
+  std::unique_ptr<unsigned char[]> pixels_b(new unsigned char[pixel_size]);
   memset(pixels_a.get(), 0, pixel_size);
   memset(pixels_b.get(), 0, pixel_size);
   DrawDisplayList(pixels_a.get(), layer_rect, list_a);