What happen if i put enableIndexedDB to true for development build also?

Development Platform & Builds
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1

in Engine\Source\Programs\AutomationTool\HTML5\HTML5Platform.Automation.cs


 // - (IndexedDB) cached
        if (Params.ClientConfigsToBuild[0].ToString() == "Shipping")
        {
            ConfigCache.GetBool("/Script/HTML5PlatformEditor.HTML5TargetSettings", "Compressed", out Compressed);
            ConfigCache.GetBool("/Script/HTML5PlatformEditor.HTML5TargetSettings", "EnableIndexedDB", out enableIndexedDB);
        }

why it always disabled for all build except Shipping??

what may happen if i disable that check and force it to enableIndexedDB to be true for development build also?