Convert //extensions/{common,shell} from scoped_ptr to std::unique_ptr

extensions/common/api/declarative/declarative_manifest_handler.cc

Index: extensions/common/api/declarative/declarative_manifest_handler.cc
diff --git a/extensions/common/api/declarative/declarative_manifest_handler.cc b/extensions/common/api/declarative/declarative_manifest_handler.cc
index b96ddf68ad60358aa932f0046477a37d2010955b..28b048205378364d3545a1bdb850ad1f4c1cdeb1 100644
--- a/extensions/common/api/declarative/declarative_manifest_handler.cc
+++ b/extensions/common/api/declarative/declarative_manifest_handler.cc
@@ -20,7 +20,7 @@ bool DeclarativeManifestHandler::Parse(Extension* extension,
                                        base::string16* error) {
   const base::Value* event_rules = NULL;
   CHECK(extension->manifest()->Get(manifest_keys::kEventRules, &event_rules));
-  scoped_ptr<DeclarativeManifestData> data =
+  std::unique_ptr<DeclarativeManifestData> data =
       DeclarativeManifestData::FromValue(*event_rules, error);
   if (!data)
     return false;