Print Preview: Make useCloudPrint a WebUI event

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index 1f29ef46a0365da1f6b323b35c20b312c5bece39..dc546dac8176940de66c77cc6e274d3ef9355832 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -188,8 +188,6 @@ const char kPrintAutomaticallyInKioskMode[] = "printAutomaticallyInKioskMode";
 // Dictionary field to indicate whether Chrome is running in forced app (app
 // kiosk) mode. It's not the same as desktop Chrome kiosk (the one above).
 const char kAppKioskMode[] = "appKioskMode";
-// Dictionary field to store Cloud Print base URL.
-const char kCloudPrintUrl[] = "cloudPrintUrl";
 // Name of a dictionary field holding the state of selection for document.
 const char kDocumentHasSelection[] = "documentHasSelection";
 // Dictionary field holding the default destination selection rules.
@@ -1433,11 +1431,10 @@ void PrintPreviewHandler::SendCloudPrintEnabled() {
       preview_web_contents()->GetBrowserContext());
   PrefService* prefs = profile->GetPrefs();
   if (prefs->GetBoolean(prefs::kCloudPrintSubmitEnabled)) {
-    base::DictionaryValue settings;
-    settings.SetString(kCloudPrintUrl,
-                       GURL(cloud_devices::GetCloudPrintURL()).spec());
-    settings.SetBoolean(kAppKioskMode, chrome::IsRunningInForcedAppMode());
-    web_ui()->CallJavascriptFunctionUnsafe("setUseCloudPrint", settings);
+    FireWebUIListener(
+        "use-cloud-print",
+        base::Value(GURL(cloud_devices::GetCloudPrintURL()).spec()),
+        base::Value(chrome::IsRunningInForcedAppMode()));
   }
 }