Convert //components/prefs from scoped_ptr to std::unique_ptr

components/prefs/pref_service.h

Index: components/prefs/pref_service.h
diff --git a/components/prefs/pref_service.h b/components/prefs/pref_service.h
index 6c95b64f6536eb1e8174bb097bda4b71bfa31099..82de7c4b79ed8852860421d95a94d3d6125999ff 100644
--- a/components/prefs/pref_service.h
+++ b/components/prefs/pref_service.h
@@ -13,6 +13,7 @@
 
 #include <stdint.h>
 
+#include <memory>
 #include <set>
 #include <string>
 
@@ -21,7 +22,6 @@
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/values.h"
@@ -251,11 +251,12 @@ class COMPONENTS_PREFS_EXPORT PrefService : public base::NonThreadSafe {
   bool HasPrefPath(const std::string& path) const;
 
   // Returns a dictionary with effective preference values.
-  scoped_ptr<base::DictionaryValue> GetPreferenceValues() const;
+  std::unique_ptr<base::DictionaryValue> GetPreferenceValues() const;
 
   // Returns a dictionary with effective preference values, omitting prefs that
   // are at their default values.
-  scoped_ptr<base::DictionaryValue> GetPreferenceValuesOmitDefaults() const;
+  std::unique_ptr<base::DictionaryValue> GetPreferenceValuesOmitDefaults()
+      const;
 
   // Returns a dictionary with effective preference values. Contrary to
   // GetPreferenceValues(), the paths of registered preferences are not split on
@@ -264,8 +265,8 @@ class COMPONENTS_PREFS_EXPORT PrefService : public base::NonThreadSafe {
   // For example, if "foo.bar" is a registered preference, the result could look
   // like this:
   //   {"foo.bar": {"a": {"b": true}}}.
-  scoped_ptr<base::DictionaryValue> GetPreferenceValuesWithoutPathExpansion()
-      const;
+  std::unique_ptr<base::DictionaryValue>
+  GetPreferenceValuesWithoutPathExpansion() const;
 
   bool ReadOnly() const;
 
@@ -302,11 +303,11 @@ class COMPONENTS_PREFS_EXPORT PrefService : public base::NonThreadSafe {
   // The PrefNotifier handles registering and notifying preference observers.
   // It is created and owned by this PrefService. Subclasses may access it for
   // unit testing.
-  scoped_ptr<PrefNotifierImpl> pref_notifier_;
+  std::unique_ptr<PrefNotifierImpl> pref_notifier_;
 
   // The PrefValueStore provides prioritized preference values. It is owned by
   // this PrefService. Subclasses may access it for unit testing.
-  scoped_ptr<PrefValueStore> pref_value_store_;
+  std::unique_ptr<PrefValueStore> pref_value_store_;
 
   scoped_refptr<PrefRegistry> pref_registry_;