This interface represents a content node that loads objects.
[scriptable, uuid(90ab443e-3e99-405e-88c9-9c42adaa3217)]
interface nsIObjectLoadingContent : nsISupports


const unsigned long TYPE_LOADING = 0

const unsigned long TYPE_IMAGE = 1

const unsigned long TYPE_PLUGIN = 2

const unsigned long TYPE_DOCUMENT = 3

const unsigned long TYPE_NULL = 4


 The actual mime type (the one we got back from the network
 request) for the element.
readonly attribute ACString actualType
 Gets the type of the content that's currently loaded. See
 the constants above for the list of possible values.
readonly attribute unsigned long displayedType
 Returns the plugin instance if it has already been instantiated. This
 will never instantiate the plugin and so is safe to call even when
 content script must not execute.
[noscript] readonly attribute nsIPluginInstance pluginInstance


 Makes sure that a frame for this object exists, and that the plugin is
 instantiated. This method does nothing if the type is not #TYPE_PLUGIN.
 There is no guarantee that there will be a frame after this method is
 called; for example, the node may have a display:none style. If plugin
 instantiation is possible, it will be done synchronously by this method,
 and the plugin instance will be returned. A success return value does not
 necessarily mean that the instance is nonnull.

 This is a noscript method because it is internal and will go away once
 plugin loading moves to content.

 @note If there is an error instantiating the plugin, this method will
 trigger fallback to replacement content, and the type will change (and
 this method will return a failure code)
[noscript] nsIPluginInstance ensureInstantiation()
 Gets the content type that corresponds to the give MIME type.  See the
 constants above for the list of possible values.  If nothing else fits,
 TYPE_NULL will be returned.
unsigned long getContentTypeForMIMEType(in AUTF8String aMimeType)
 Tells the content about an associated object frame.
 This can be called multiple times for different frames.

 This is noscript because this is an internal method that will go away, and
 because nsIObjectFrame is unscriptable.
[noscript] void hasNewFrame(in nsIObjectFrame aFrame)