Replace scoped_ptr with std::unique_ptr in //ui

R=sadrul, sky
TBR=bshe,aelias,rockot,piman,achuith,reveman
BUG=554298
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1868363002

Cr-Commit-Position: refs/heads/master@{#386812}
diff --git a/ui/gfx/text_elider_unittest.cc b/ui/gfx/text_elider_unittest.cc
index 4490110..cb26c48 100644
--- a/ui/gfx/text_elider_unittest.cc
+++ b/ui/gfx/text_elider_unittest.cc
@@ -8,12 +8,12 @@
 
 #include <stddef.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"