Adding virtual destructor to CloudPrintURLFetcherFactory

Adding empty virtual destructor to CloudPrintURLFetcherFactory
to align it with Chromium coding style.

BUG=


Review URL: https://chromiumcodereview.appspot.com/12230020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182332 0039d316-1c4b-4281-b951-d872f2087c98

chrome/service/cloud_print/cloud_print_url_fetcher.cc

@@ -22,6 +22,9 @@ namespace cloud_print {
 
 static CloudPrintURLFetcherFactory* g_factory = NULL;
 
+// virtual
+CloudPrintURLFetcherFactory::~CloudPrintURLFetcherFactory() {}
+
 // static
 CloudPrintURLFetcher* CloudPrintURLFetcher::Create() {
   CloudPrintURLFetcherFactory* factory = CloudPrintURLFetcher::factory();

chrome/service/cloud_print/cloud_print_url_fetcher.h

@@ -30,6 +30,7 @@ class CloudPrintURLFetcher;
 class CloudPrintURLFetcherFactory {
  public:
   virtual CloudPrintURLFetcher* CreateCloudPrintURLFetcher() = 0;
+  virtual ~CloudPrintURLFetcherFactory();
 };
 
 // A wrapper around URLFetcher for CloudPrint. URLFetcher applies retry logic