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

cc/debug/debug_rect_history.cc

Index: cc/debug/debug_rect_history.cc
diff --git a/cc/debug/debug_rect_history.cc b/cc/debug/debug_rect_history.cc
index cd3830317fe009442f93b75cc525ef1ebb3a5ab6..02264216c429bceb21d63d5f5a3da55db560922b 100644
--- a/cc/debug/debug_rect_history.cc
+++ b/cc/debug/debug_rect_history.cc
@@ -6,6 +6,7 @@
 
 #include <stddef.h>
 
+#include "base/memory/ptr_util.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/layer_iterator.h"
@@ -21,8 +22,8 @@
 namespace cc {
 
 // static
-scoped_ptr<DebugRectHistory> DebugRectHistory::Create() {
-  return make_scoped_ptr(new DebugRectHistory());
+std::unique_ptr<DebugRectHistory> DebugRectHistory::Create() {
+  return base::WrapUnique(new DebugRectHistory());
 }
 
 DebugRectHistory::DebugRectHistory() {}