Add ErrorConsole UI for Extension Install Warnings

extensions/common/manifest_constants.cc

Index: extensions/common/manifest_constants.cc
diff --git a/extensions/common/manifest_constants.cc b/extensions/common/manifest_constants.cc
index fcdf6e99fc88605daef96ec67be3bc7ae32dc8da..9fa1ada966b0cfde5fa0be3150bb9553b9b88a4d 100644
--- a/extensions/common/manifest_constants.cc
+++ b/extensions/common/manifest_constants.cc
@@ -148,4 +148,12 @@ const char kWebURLs[] = "app.urls";
 
 }  // namespace manifest_keys
 
+namespace manifest_errors {
+
+const char kPermissionUnknownOrMalformed[] =
+    "Permission '*' is unknown or URL pattern is malformed.";
+const char kUnrecognizedManifestKey[] = "Unrecognized manifest key '*'.";
+
+}  // namespace manifest_errors
+
 }  // namespace extensions