Follow-up 4107d1d4: avoid JS errors when trying to call mw.track() from jquery.migrate

Some migrateWarn() calls (like the one for compatMode) happen before
mw is created. Don't crash on trying to call mw.track() in that case.

Change-Id: I9e33af2865bb10adc0473045f714fe4f9f699861

diff --git a/resources/lib/jquery/jquery.migrate.js b/resources/lib/jquery/jquery.migrate.js
index 12212ff..70512e0 100644 (file)
--- a/resources/lib/jquery/jquery.migrate.js
+++ b/resources/lib/jquery/jquery.migrate.js
@@ -83,7 +83,9 @@ function migrateWarn( msg ) {
                warnedAbout[ msg ] = true;
                jQuery.migrateWarnings.push( msg );
                // PATCH: Add instrumentation for statistics --Krinkle
                warnedAbout[ msg ] = true;
                jQuery.migrateWarnings.push( msg );
                // PATCH: Add instrumentation for statistics --Krinkle

-               mw.track( "mw.deprecate", "jquery-migrate" );
+               if ( window.mw && window.mw.track ) {
+                       window.mw.track( "mw.deprecate", "jquery-migrate" );
+               }

                if ( console && console.warn && !jQuery.migrateMute ) {
                        console.warn( "JQMIGRATE: " + msg );
                        if ( jQuery.migrateTrace && console.trace ) {
                if ( console && console.warn && !jQuery.migrateMute ) {
                        console.warn( "JQMIGRATE: " + msg );
                        if ( jQuery.migrateTrace && console.trace ) {