Replace scoped_ptr with std::unique_ptr in //ui

ui/gfx/x/x11_atom_cache.cc

Index: ui/gfx/x/x11_atom_cache.cc
diff --git a/ui/gfx/x/x11_atom_cache.cc b/ui/gfx/x/x11_atom_cache.cc
index 5288d6d287f248e8078248ad1b09ed215d2334d1..0d179343135a3e71ac29836595d40836944b54db 100644
--- a/ui/gfx/x/x11_atom_cache.cc
+++ b/ui/gfx/x/x11_atom_cache.cc
@@ -7,8 +7,9 @@
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 
+#include <memory>
+
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 
 namespace ui {
 
@@ -19,7 +20,7 @@ X11AtomCache::X11AtomCache(XDisplay* xdisplay, const char* const* to_cache)
   for (const char* const* i = to_cache; *i; ++i)
     ++cache_count;
 
-  scoped_ptr<XAtom[]> cached_atoms(new XAtom[cache_count]);
+  std::unique_ptr<XAtom[]> cached_atoms(new XAtom[cache_count]);
 
   // Grab all the atoms we need now to minimize roundtrips to the X11 server.
   XInternAtoms(xdisplay_,