nsIDocShell Interface

 Begin firing WebProgressListener notifications for restoring a page
 presentation. |viewer| is the content viewer whose document we are
 starting to load.  If null, it defaults to the docshell's current content
 viewer, creating one if necessary.  |top| should be true for the toplevel
 docshell that is being restored; it will be set to false when this method
 is called for child docshells.  This method will post an event to
 complete the simulated load after returning to the event loop.

void beginRestore(in nsIContentViewer viewer, in boolean top)

 Creates a DocShellLoadInfo object that you can manipulate and then pass
 to loadURI.

void createLoadInfo(out nsIDocShellLoadInfo loadInfo)

 Finish firing WebProgressListener notifications and DOM events for
 restoring a page presentation.  This should only be called via
 beginRestore().

void finishRestore()

 Notify the associated content viewer and all child docshells that they are
 about to be hidden.  If |isUnload| is true, then the document is being
 unloaded as well.

[noscript] void firePageHideNotification(in boolean isUnload)

 Notification that entries have been removed from the beginning of a
 nsSHistory which has this as its rootDocShell.

 @param numEntries - The number of entries removed

void historyPurged(in long numEntries)

 Loads the given URI.  This method is identical to loadURI(...) except
 that its parameter list is broken out instead of being packaged inside
 of an nsIDocShellLoadInfo object...

 @param aURI            - The URI to load.
 @param aReferrer       - Referring URI
 @param aOwner          - Owner (security principal) 
 @param aInheritOwner   - Flag indicating whether the owner of the current
                          document should be inherited if aOwner is null.
 @param aStopActiveDoc  - Flag indicating whether loading the current
                          document should be stopped.
 @param aWindowTarget   - Window target for the load.
 @param aTypeHint       - A hint as to the content-type of the resulting
                          data.  May be null or empty if no hint.
 @param aPostDataStream - Post data stream (if POSTing)
 @param aHeadersStream  - Stream containing "extra" request headers...
 @param aLoadFlags      - Flags to modify load behaviour. Flags are defined
                          in nsIWebNavigation.
 @param aSHEntry        - Active Session History entry (if loading from SH)

[noscript] void internalLoad(in nsIURI aURI, in nsIURI aReferrer, in nsISupports aOwner, in PRUint32 aFlags, in wstring aWindowTarget, in string aTypeHint, in nsIInputStream aPostDataStream, in nsIInputStream aHeadersStream, in unsigned long aLoadFlags, in nsISHEntry aSHEntry, in boolean firstParty, out nsIDocShell aDocShell, out nsIRequest aRequest)

 Loads a given stream. This will give priority to loading the requested
 stream in the object implementing this interface. If it can't be loaded
 here however, the URL dispatched will go through its normal process of
 content loading.

 @param aStream         - The input stream that provides access to the data
                          to be loaded.  This must be a blocking, threadsafe
                          stream implementation.
 @param aURI            - The URI representing the stream, or null.
 @param aContentType    - The type (MIME) of data being loaded (empty if unknown).
 @param aContentCharset - The charset of the data being loaded (empty if unknown).
 @param aLoadInfo       - This is the extended load info for this load.  This
                          most often will be null, but if you need to do 
                          additional setup for this load you can get a
                          loadInfo object by calling createLoadInfo.  Once
                          you have this object you can set the needed 
                          properties on it and then pass it to loadStream.

[noscript] void loadStream(in nsIInputStream aStream, in nsIURI aURI, in ACString aContentType, in ACString aContentCharset, in nsIDocShellLoadInfo aLoadInfo)

 Loads a given URI.  This will give priority to loading the requested URI
 in the object implementing	this interface.  If it can't be loaded here
 however, the URL dispatcher will go through its normal process of content
 loading.

 @param uri        - The URI to load.
 @param loadInfo   - This is the extended load info for this load.  This
                     most often will be null, but if you need to do 
                     additional setup for this load you can get a loadInfo
                     object by calling createLoadInfo.  Once you have this
                     object you can set the needed properties on it and
                     then pass it to loadURI.
 @param aLoadFlags - Flags to modify load behaviour. Flags are defined
                     in nsIWebNavigation.

[noscript] void loadURI(in nsIURI uri, in nsIDocShellLoadInfo loadInfo, in unsigned long aLoadFlags, in boolean firstParty)

 Reset state to a new content model within the current document and the document
 viewer.  Called by the document before initiating an out of band document.write().

void prepareForNewContentModel()

 Restart the XPCOM timers for each meta-refresh URI in this docshell,
 and this docshell's children, recursively.  If the timers are already
 running, this has no effect.

void resumeRefreshURIs()

 For editors and suchlike who wish to change the URI associated with the
 document. Note if you want to get the current URI, use the read-only
 property on nsIWebNavigation.

void setCurrentURI(in nsIURI aURI)

 Cancel the XPCOM timers for each meta-refresh URI in this docshell,
 and this docshell's children, recursively. The meta-refresh timers can be
 restarted using resumeRefreshURIs().  If the timers are already suspended,
 this has no effect.

void suspendRefreshURIs()