Added cache flush on network change to ServiceDiscoveryHostClient

chrome/browser/resources/local_discovery/local_discovery.js

Index: chrome/browser/resources/local_discovery/local_discovery.js
diff --git a/chrome/browser/resources/local_discovery/local_discovery.js b/chrome/browser/resources/local_discovery/local_discovery.js
index 173fbab0d21dc1b957e0b567714888edb5233f35..e9491d620ab688b394c37e2e3b18f3f407f2b034 100644
--- a/chrome/browser/resources/local_discovery/local_discovery.js
+++ b/chrome/browser/resources/local_discovery/local_discovery.js
@@ -204,17 +204,7 @@ cr.define('local_discovery', function() {
       }
     }
 
-    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();
   }
 
   /**
@@ -245,6 +235,29 @@ cr.define('local_discovery', function() {
     }
   }
 
+  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.
@@ -328,6 +341,7 @@ cr.define('local_discovery', function() {
     onRegistrationFailed: onRegistrationFailed,
     onUnregisteredDeviceUpdate: onUnregisteredDeviceUpdate,
     onRegistrationConfirmedOnPrinter: onRegistrationConfirmedOnPrinter,
-    onCloudDeviceListAvailable: onCloudDeviceListAvailable
+    onCloudDeviceListAvailable: onCloudDeviceListAvailable,
+    onDeviceCacheFlushed: onDeviceCacheFlushed
   };
 });