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

cc/playback/clip_path_display_item.cc

Index: cc/playback/clip_path_display_item.cc
diff --git a/cc/playback/clip_path_display_item.cc b/cc/playback/clip_path_display_item.cc
index 64ad81338baa68b72a206bad0104946c020fa97e..a5dccec8cc40dbf01bff5c47ce2c7853a51ed7ea 100644
--- a/cc/playback/clip_path_display_item.cc
+++ b/cc/playback/clip_path_display_item.cc
@@ -62,7 +62,7 @@ void ClipPathDisplayItem::ToProtobuf(
   // Just use skia's serialization method for the SkPath for now.
   size_t path_size = clip_path_.writeToMemory(nullptr);
   if (path_size > 0) {
-    scoped_ptr<uint8_t[]> buffer(new uint8_t[path_size]);
+    std::unique_ptr<uint8_t[]> buffer(new uint8_t[path_size]);
     clip_path_.writeToMemory(buffer.get());
     details->set_clip_path(buffer.get(), path_size);
   }