Make base::Value::TYPE a scoped enum.

components/prefs/overlay_user_pref_store_unittest.cc

Index: components/prefs/overlay_user_pref_store_unittest.cc
diff --git a/components/prefs/overlay_user_pref_store_unittest.cc b/components/prefs/overlay_user_pref_store_unittest.cc
index ae3208159733d744661dd8e2f0419c40d15934bb..d722aeab6e01002dd4276c81c96c0db751a833c5 100644
--- a/components/prefs/overlay_user_pref_store_unittest.cc
+++ b/components/prefs/overlay_user_pref_store_unittest.cc
@@ -137,19 +137,19 @@ TEST_F(OverlayUserPrefStoreTest, ModifyDictionaries) {
   Value* modify = NULL;
   EXPECT_TRUE(overlay_->GetMutableValue(overlay_key, &modify));
   ASSERT_TRUE(modify);
-  ASSERT_TRUE(modify->IsType(Value::TYPE_DICTIONARY));
+  ASSERT_TRUE(modify->IsType(Value::Type::DICTIONARY));
   static_cast<DictionaryValue*>(modify)->SetInteger(overlay_key, 42);
 
   Value* original_in_underlay = NULL;
   EXPECT_TRUE(underlay_->GetMutableValue(overlay_key, &original_in_underlay));
   ASSERT_TRUE(original_in_underlay);
-  ASSERT_TRUE(original_in_underlay->IsType(Value::TYPE_DICTIONARY));
+  ASSERT_TRUE(original_in_underlay->IsType(Value::Type::DICTIONARY));
   EXPECT_TRUE(static_cast<DictionaryValue*>(original_in_underlay)->empty());
 
   Value* modified = NULL;
   EXPECT_TRUE(overlay_->GetMutableValue(overlay_key, &modified));
   ASSERT_TRUE(modified);
-  ASSERT_TRUE(modified->IsType(Value::TYPE_DICTIONARY));
+  ASSERT_TRUE(modified->IsType(Value::Type::DICTIONARY));
   EXPECT_TRUE(Value::Equals(modify, static_cast<DictionaryValue*>(modified)));
 }