Add default -Werror to frameworks/webview/chromium.

Bug: 66996870
Test: normal build
Change-Id: Ifb3a44dd073dd7f028295e102bd561feaf98cf26
diff --git a/cc/config/global.go b/cc/config/global.go
index 52cfb14..bfb53e9 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -132,7 +132,6 @@
 	WarningAllowedOldProjects = []string{
 		"frameworks/av/drm/mediacas/plugins/",
 		"frameworks/av/services/mediaextractor/",
-		"frameworks/webview/chromium/",
 		"hardware/libhardware/modules/",
 		"hardware/qcom/",
 		"tools/adt/idea/android/ultimate/get_modification_time/jni/",