Added cache flush on network change to ServiceDiscoveryHostClient

chrome/browser/resources/local_discovery/local_discovery.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * Javascript for local_discovery.html, served from chrome://devices/
  * This is used to show discoverable devices near the user as well as
  * cloud devices registered to them.
  *
  * The object defined in this javascript file listens for callbacks from the
@@ skipping 189 matching lines @@
         devices[name] = new Device(info);
         devices[name].renderDevice();
       }
     } else {
       if (devices.hasOwnProperty(name)) {
         devices[name].removeDevice();
         delete devices[name];
       }
     }
 
-    var numberPrinters = $('register-device-list').children.length;
-    $('printer-num').textContent = generateNumberPrintersAvailableText(
-      numberPrinters);
-
-    if (numberPrinters == 0) {
-      $('register-message').textContent = loadTimeData.getString(
-        'noPrintersOnNetworkExplanation');
-    } else {
-      $('register-message').textContent = loadTimeData.getString(
-        'registerConfirmMessage');
-    }
+    updateUIToReflectNumberOfLocalDevices();
   }
 
   /**
    * Handle a list of cloud devices available to the user globally.
    * @param {Array.<Object>} devices_list List of devices.
    */
   function onCloudDeviceListAvailable(devices_list) {
     var devicesListLength = devices_list.length;
     var devicesContainer = $('cloud-devices');
 
@@ skipping 10 matching lines @@
       } else {
         description = devices_list[i].description;
       }
 
       fillDeviceDescription(devicesDomElement, devices_list[i].display_name,
                             description, 'Manage' /*Localize*/,
                             manageCloudDevice.bind(null, devices_list[i].id));
     }
   }
 
+  function onDeviceCacheFlushed() {
+    for (var deviceName in devices) {
+      devices[deviceName].removeDevice();
+      delete devices[deviceName];
+    }
+
+    updateUIToReflectNumberOfLocalDevices();
+  }
+
+  function updateUIToReflectNumberOfLocalDevices() {
+    var numberPrinters = $('register-device-list').children.length;
+    $('printer-num').textContent = generateNumberPrintersAvailableText(
+      numberPrinters);
+
+    if (numberPrinters == 0) {
+      $('register-message').textContent = loadTimeData.getString(
+        'noPrintersOnNetworkExplanation');
+    } else {
+      $('register-message').textContent = loadTimeData.getString(
+        'registerConfirmMessage');
+    }
+  }
+
 
   /**
    * Announce that a registration succeeeded.
    */
   function onRegistrationSuccess() {
     hideRegisterOverlay();
     requestPrinterList();
   }
 
   /**
@@ skipping 63 matching lines @@
 
     chrome.send('start');
     requestPrinterList();
   });
 
   return {
     onRegistrationSuccess: onRegistrationSuccess,
     onRegistrationFailed: onRegistrationFailed,
     onUnregisteredDeviceUpdate: onUnregisteredDeviceUpdate,
     onRegistrationConfirmedOnPrinter: onRegistrationConfirmedOnPrinter,
-    onCloudDeviceListAvailable: onCloudDeviceListAvailable
+    onCloudDeviceListAvailable: onCloudDeviceListAvailable,
+    onDeviceCacheFlushed: onDeviceCacheFlushed
   };
 });