Add ErrorConsole UI for Extension Install Warnings

extensions/common/manifest.cc

Index: extensions/common/manifest.cc
diff --git a/extensions/common/manifest.cc b/extensions/common/manifest.cc
index eaaaf76061b120430effecd50dd2bfd20efc4215..85b5d986f99b61223aea700868004717812c24fb 100644
--- a/extensions/common/manifest.cc
+++ b/extensions/common/manifest.cc
@@ -160,8 +160,8 @@ bool Manifest::ValidateManifest(
        it.Advance()) {
     if (!provider->GetFeature(it.key())) {
       warnings->push_back(InstallWarning(
-          base::StringPrintf("Unrecognized manifest key '%s'.",
-                             it.key().c_str()),
+          ErrorUtils::FormatErrorMessage(
+              manifest_errors::kUnrecognizedManifestKey, it.key()),
           it.key()));
     }
   }