Remove PersistentPrefStore::MarkNeedsEmptyValue.

base/values_unittest.cc

Index: base/values_unittest.cc
diff --git a/base/values_unittest.cc b/base/values_unittest.cc
index 98bc73c9a1b7ee50613ec562cd233a3eca23cccf..b345415d52d770dcd2cb2400f45912c45f8d951e 100644
--- a/base/values_unittest.cc
+++ b/base/values_unittest.cc
@@ -325,6 +325,31 @@ TEST(ValuesTest, DictionaryWithoutPathExpansion) {
   EXPECT_EQ(Value::TYPE_NULL, value4->GetType());
 }
 
+TEST(ValuesTest, DictionaryRemovePath) {
+  DictionaryValue dict;
+  dict.Set("a.long.way.down", Value::CreateIntegerValue(1));
+  dict.Set("a.long.key.path", Value::CreateBooleanValue(true));
+
+  base::Value* out_value = NULL;
+  EXPECT_TRUE(dict.RemovePath("a.long.way.down", &out_value));
+  ASSERT_TRUE(out_value);
+  EXPECT_TRUE(out_value->IsType(base::Value::TYPE_INTEGER));
+  EXPECT_FALSE(dict.HasKey("a.long.way.down"));
+  EXPECT_FALSE(dict.HasKey("a.long.way"));
+  EXPECT_TRUE(dict.Get("a.long.key.path", NULL));
+
+  out_value = NULL;
+  EXPECT_FALSE(dict.RemovePath("a.long.way.down", &out_value));
+  EXPECT_FALSE(out_value);
+  EXPECT_TRUE(dict.Get("a.long.key.path", NULL));
+
+  out_value = NULL;
+  EXPECT_TRUE(dict.RemovePath("a.long.key.path", &out_value));
+  ASSERT_TRUE(out_value);
+  EXPECT_TRUE(out_value->IsType(base::Value::TYPE_BOOLEAN));
+  EXPECT_TRUE(dict.empty());
+}
+
 TEST(ValuesTest, DeepCopy) {
   DictionaryValue original_dict;
   Value* original_null = Value::CreateNullValue();