add Delete() to the nsIFileSpec interface.

widget/src/xpwidgets/nsFileSpecWithUIImpl.h

@@ -166,6 +166,10 @@ class nsFileSpecWithUIImpl
 	NS_IMETHOD Touch ()
 		{ return mBaseFileSpec ? mBaseFileSpec->Touch() : NS_ERROR_NOT_INITIALIZED; }
        
+	/* void delete (in boolean aRecursive); */
+	NS_IMETHOD Delete(PRBool aRecursive)
+		{ return mBaseFileSpec ? mBaseFileSpec->Delete(aRecursive) : NS_ERROR_NOT_INITIALIZED; }
+
 	/* void truncate (in long aNewLength); */
 	NS_IMETHOD Truncate(PRInt32 aNewLength)
 		{ return mBaseFileSpec ? mBaseFileSpec->Truncate(aNewLength) : NS_ERROR_NOT_INITIALIZED; }

xpcom/io/nsFileSpecImpl.cpp

@@ -392,6 +392,13 @@ NS_IMETHODIMP nsFileSpecImpl::CreateDir()
 	return mFileSpec.Error();
 }
 
+//----------------------------------------------------------------------------------------
+NS_IMETHODIMP nsFileSpecImpl::Delete(PRBool aRecursive)
+//----------------------------------------------------------------------------------------
+{
+	mFileSpec.Delete(aRecursive);
+	return mFileSpec.Error();
+}
 //----------------------------------------------------------------------------------------
 NS_IMETHODIMP nsFileSpecImpl::Truncate(PRInt32 aNewLength)
 //----------------------------------------------------------------------------------------

xpcom/io/nsIFileSpec.idl

@@ -102,6 +102,7 @@ interface nsIFileSpec : nsISupports
 	boolean isSymlink();
 	void resolveSymlink();
 
+	void delete(in boolean recursive);
     void truncate(in long aNewLength);
 	void rename([const] in string newLeafName);
 	void copyToDir([const] in nsIFileSpec newParentDir);