334747, 339893 - desktop application feed readers do not display their app name properly or launch with the specified feed on OSX due to lack of support for a function to get the application bundle name, and a method to invoke an application bundle on OS X with a URL. Add an attribute to nsILocalFileMac called bundleDisplayName to show the application's name, and a method to nsIShellService called openApplicationWithURL which launches an application with a URL parameter appropriately across platforms (nsIProcess on windows and linux, LaunchServices on OS X). Update the client code to use bundleDisplayName, and also the <filefield> binding in preferences to use it too. r=mark sr=darin

browser/components/shell/src/nsGNOMEShellService.cpp

@@ -49,6 +49,7 @@
 #include "nsIStringBundle.h"
 #include "gfxIImageFrame.h"
 #include "nsIOutputStream.h"
+#include "nsIProcess.h"
 #include "nsNetUtil.h"
 #include "nsIDOMHTMLImageElement.h"
 #include "nsIImageLoadingContent.h"
@@ -541,3 +542,22 @@ nsGNOMEShellService::OpenApplication(PRInt32 aApplication)
 
   return err ? NS_OK : NS_ERROR_FAILURE;
 }
+
+NS_IMETHODIMP
+nsGNOMEShellService::OpenApplicationWithURI(nsILocalFile* aApplication, const nsACString& aURI)
+{
+  nsresult rv;
+  nsCOMPtr<nsIProcess> process = 
+    do_CreateInstance("@mozilla.org/process/util;1", &rv);
+  if (NS_FAILED(rv))
+    return rv;
+  
+  rv = process->Init(aApplication);
+  if (NS_FAILED(rv))
+    return rv;
+
+  const nsPromiseFlatCString& spec = PromiseFlatCString(aURI);
+  const char* specStr = spec.get();
+  PRUint32 pid;
+  return process->Run(PR_FALSE, &specStr, 1, &pid);
+}