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

cc/blink/web_content_layer_impl.cc

Index: cc/blink/web_content_layer_impl.cc
diff --git a/cc/blink/web_content_layer_impl.cc b/cc/blink/web_content_layer_impl.cc
index b7a855cd28279f7e24beb1ca9f57d273dbe0c71f..fad754658e94aa69d80a3c298f5eb3b2f9921d72 100644
--- a/cc/blink/web_content_layer_impl.cc
+++ b/cc/blink/web_content_layer_impl.cc
@@ -7,6 +7,7 @@
 #include <stddef.h>
 
 #include "base/command_line.h"
+#include "base/memory/ptr_util.h"
 #include "cc/base/switches.h"
 #include "cc/blink/web_display_item_list_impl.h"
 #include "cc/layers/picture_layer.h"
@@ -51,7 +52,7 @@ PaintingControlToWeb(
 
 WebContentLayerImpl::WebContentLayerImpl(blink::WebContentLayerClient* client)
     : client_(client) {
-  layer_ = make_scoped_ptr(new WebLayerImpl(PictureLayer::Create(this)));
+  layer_ = base::WrapUnique(new WebLayerImpl(PictureLayer::Create(this)));
   layer_->layer()->SetIsDrawable(true);
 }