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

components/sessions/ios/ios_serialized_navigation_builder_unittest.mm

Index: components/sessions/ios/ios_serialized_navigation_builder_unittest.mm
diff --git a/components/sessions/ios/ios_serialized_navigation_builder_unittest.mm b/components/sessions/ios/ios_serialized_navigation_builder_unittest.mm
index ecba67c96305a7de226f3f1e5ad2b1106520737b..938e68091ba4dbb8625a4b59fd8c28ef10fb2c88 100644
--- a/components/sessions/ios/ios_serialized_navigation_builder_unittest.mm
+++ b/components/sessions/ios/ios_serialized_navigation_builder_unittest.mm
@@ -16,8 +16,8 @@ namespace sessions {
 namespace {
 // Creates a NavigationItem from the test_data constants in
 // serialized_navigation_entry_test_helper.h.
-scoped_ptr<web::NavigationItem> MakeNavigationItemForTest() {
-  scoped_ptr<web::NavigationItem> navigation_item(
+std::unique_ptr<web::NavigationItem> MakeNavigationItemForTest() {
+  std::unique_ptr<web::NavigationItem> navigation_item(
       web::NavigationItem::Create());
   navigation_item->SetReferrer(web::Referrer(
       test_data::kReferrerURL,
@@ -37,7 +37,7 @@ scoped_ptr<web::NavigationItem> MakeNavigationItemForTest() {
 // Create a SerializedNavigationEntry from a NavigationItem.  All its fields
 // should match the NavigationItem's.
 TEST(IOSSerializedNavigationBuilderTest, FromNavigationItem) {
-  const scoped_ptr<web::NavigationItem> navigation_item(
+  const std::unique_ptr<web::NavigationItem> navigation_item(
       MakeNavigationItemForTest());
 
   const SerializedNavigationEntry& navigation =
@@ -75,14 +75,14 @@ TEST(IOSSerializedNavigationBuilderTest, FromNavigationItem) {
 // except for fields that aren't preserved, which should be set to
 // expected values.
 TEST(IOSSerializedNavigationBuilderTest, ToNavigationItem) {
-  const scoped_ptr<web::NavigationItem> old_navigation_item(
+  const std::unique_ptr<web::NavigationItem> old_navigation_item(
       MakeNavigationItemForTest());
 
   const SerializedNavigationEntry& navigation =
       IOSSerializedNavigationBuilder::FromNavigationItem(
           test_data::kIndex, *old_navigation_item);
 
-  const scoped_ptr<web::NavigationItem> new_navigation_item(
+  const std::unique_ptr<web::NavigationItem> new_navigation_item(
       IOSSerializedNavigationBuilder::ToNavigationItem(&navigation));
 
   EXPECT_EQ(old_navigation_item->GetURL(),