unix: should remove the Reveal Location & Launch File buttons from download progress dialog

bug=90008 r=jkeiser sr=bzbarsky a=asa

embedding/components/ui/progressDlg/nsProgressDialog.js

@@ -590,13 +590,23 @@ nsProgressDialog.prototype = {
                 cancelButton.label = this.getString( "close" );
                 cancelButton.focus();
 
-                // Activate reveal/launch buttons.
-                this.enable( "reveal" );
+                // Activate reveal/launch buttons if we are them.
+                var enableButtons = true;
                 try {
-                    if ( this.target && !this.target.isExecutable() ) {
-                        this.enable( "launch" );
+                  var prefs = Components.classes[ "@mozilla.org/preferences-service;1" ]
+                                  .getService( Components.interfaces.nsIPrefBranch );
+                  enableButtons = prefs.getBoolPref( "browser.download.progressDnldDialog.enable_launch_reveal_buttons" );
+                } catch ( e ) {
+                }
+
+                if ( enableButtons ) {
+                    this.enable( "reveal" );
+                    try {
+                        if ( this.target && !this.target.isExecutable() ) {
+                            this.enable( "launch" );
+                        }
+                    } catch(e) {
                     }
-                } catch(e) {
                 }
 
                 // Disable the Pause/Resume buttons.

modules/libpref/src/init/all.js

@@ -134,6 +134,7 @@ pref("browser.prefWindowModal", true);
 pref("browser.show_about_as_stupid_modal_window", false);
 
 pref("browser.download.progressDnldDialog.keepAlive", true); // keep the dnload progress dialog up after dnload is complete
+pref("browser.download.progressDnldDialog.enable_launch_reveal_buttons", true);
 
 // various default search settings
 pref("browser.search.defaulturl", "chrome://navigator-region/locale/region.properties");

modules/libpref/src/unix/unix.js

@@ -362,6 +362,9 @@ pref("print.postscript.nativefont.x-western",      "");
 pref("print.postscript.nativefont.zh-CN",          "");
 pref("print.postscript.nativefont.zh-TW",          "");
 
+// For the download dialog
+pref("browser.download.progressDnldDialog.enable_launch_reveal_buttons", false);
+
 pref("mail.signature_date", 0);
 
 // until bug #130581 is fixed, we need to override this on linux