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

cc/resources/memory_history.cc

Index: cc/resources/memory_history.cc
diff --git a/cc/resources/memory_history.cc b/cc/resources/memory_history.cc
index 29bad2a30b32946656aad5e86b971074525fee76..caf849807e9021428d4f8da9bc4e7a998366a41a 100644
--- a/cc/resources/memory_history.cc
+++ b/cc/resources/memory_history.cc
@@ -6,11 +6,13 @@
 
 #include <limits>
 
+#include "base/memory/ptr_util.h"
+
 namespace cc {
 
 // static
-scoped_ptr<MemoryHistory> MemoryHistory::Create() {
-  return make_scoped_ptr(new MemoryHistory());
+std::unique_ptr<MemoryHistory> MemoryHistory::Create() {
+  return base::WrapUnique(new MemoryHistory());
 }
 
 MemoryHistory::MemoryHistory() {}