Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/value_store/leveldb_scoped_database_unittest.cc

Index: extensions/browser/value_store/leveldb_scoped_database_unittest.cc
diff --git a/extensions/browser/value_store/leveldb_scoped_database_unittest.cc b/extensions/browser/value_store/leveldb_scoped_database_unittest.cc
index 738802bfc983fe20835c4cd3888576de53a40645..21cbdbc0fd5d5cd1038b34c4c20092c65335f920 100644
--- a/extensions/browser/value_store/leveldb_scoped_database_unittest.cc
+++ b/extensions/browser/value_store/leveldb_scoped_database_unittest.cc
@@ -41,7 +41,7 @@ class LeveldbScopedDatabaseUnitTest : public testing::Test {
     values->clear();
     leveldb::ReadOptions read_options;
     read_options.verify_checksums = true;
-    scoped_ptr<leveldb::Iterator> iterator;
+    std::unique_ptr<leveldb::Iterator> iterator;
     ValueStore::Status status = db_->CreateIterator(read_options, &iterator);
     if (!status.ok())
       return status;
@@ -159,7 +159,7 @@ TEST_F(LeveldbScopedDatabaseUnitTest, TestEmptyValue) {
   values.SetString("s1_key1", "");
   EXPECT_TRUE(db_->Write("scope1", values).ok());
 
-  scoped_ptr<base::Value> value;
+  std::unique_ptr<base::Value> value;
   ASSERT_TRUE(db_->Read("scope1", "s1_key1", &value).ok());
   std::string str;
   EXPECT_TRUE(value->GetAsString(&str));
@@ -171,7 +171,7 @@ TEST_F(LeveldbScopedDatabaseUnitTest, TestValueContainingDelimiter) {
   values.SetString("s1_key1", "with:delimiter");
   EXPECT_TRUE(db_->Write("scope1", values).ok());
 
-  scoped_ptr<base::Value> value;
+  std::unique_ptr<base::Value> value;
   ASSERT_TRUE(db_->Read("scope1", "s1_key1", &value).ok());
   std::string str;
   EXPECT_TRUE(value->GetAsString(&str));