Bug 384667 - AT-SPI events not generated for all Firefox progress bars.

r=mconnor

toolkit/mozapps/downloads/content/download.xml

@@ -169,7 +169,7 @@
           <xul:hbox flex="1">
             <xul:vbox flex="1">
               <xul:label xbl:inherits="value=target" crop="center"/>
-              <xul:progressmeter mode="normal" value="0" flex="1"
+              <xul:progressmeter anonid="progressmeter" mode="normal" value="0" flex="1"
                                 xbl:inherits="value=progress,mode=progressmode"/>
             </xul:vbox>
             <xul:vbox pack="start">
@@ -310,7 +310,7 @@
           <xul:hbox flex="1">
             <xul:vbox flex="1">
               <xul:label xbl:inherits="value=target" crop="center"/>
-              <xul:progressmeter mode="normal" value="0" flex="1"
+              <xul:progressmeter anonid="progressmeter" mode="normal" value="0" flex="1"
                                 xbl:inherits="value=progress,mode=progressmode"/>
             </xul:vbox>
             <xul:vbox pack="start">

toolkit/mozapps/downloads/content/downloads.js

@@ -433,6 +433,12 @@ function onUpdateProgress()
     // Update progress
     getDownload(dl.id).setAttribute("progress", dl.percentComplete);
 
+    // Fire DOM event so that accessible value change events occur
+    var progressmeter = document.getAnonymousElementByAttribute(getDownload(dl.id), "anonid", "progressmeter");
+    var event = document.createEvent('Events');
+    event.initEvent('ValueChange', true, true);
+    progressmeter.dispatchEvent(event);
+
     // gActiveDownloads is screwed so it's possible 
     // to have more files than we're really downloading.
     // The good news is that those files have size==0.