Backed out changeset ba6a9e60d2c6 (bug 1067711) for XPCshell Test failures

xpcom/base/SystemMemoryReporter.cpp

@@ -543,8 +543,6 @@ private:
           aName.AppendLiteral("/extensions");
         } else if (dirname.Find("/fontconfig") != -1) {
           aName.AppendLiteral("/fontconfig");
-        } else {
-          aName.AppendLiteral("/misc");
         }
         aTag = aName;
         aName.Append('/');