Convert //components/[f-n]* from scoped_ptr to std::unique_ptr

BUG=554298
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Review URL: https://codereview.chromium.org/1918083002

Cr-Commit-Position: refs/heads/master@{#389715}
diff --git a/components/flags_ui/flags_state_unittest.cc b/components/flags_ui/flags_state_unittest.cc
index be6a4d3..628331b 100644
--- a/components/flags_ui/flags_state_unittest.cc
+++ b/components/flags_ui/flags_state_unittest.cc
@@ -7,6 +7,7 @@
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 
@@ -14,7 +15,6 @@
 #include "base/feature_list.h"
 #include "base/format_macros.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ -126,7 +126,7 @@
 
   TestingPrefServiceSimple prefs_;
   PrefServiceFlagsStorage flags_storage_;
-  scoped_ptr<FlagsState> flags_state_;
+  std::unique_ptr<FlagsState> flags_state_;
 };
 
 TEST_F(FlagsStateTest, NoChangeNoRestart) {