Print Preview: Make useCloudPrint a WebUI event

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

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 #include <stddef.h>
 
 #include <map>
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 // locale.
 const char kMeasurementSystem[] = "measurementSystem";
 // Name of a dictionary field holding the number format according to the locale.
 const char kNumberFormat[] = "numberFormat";
 // Name of a dictionary field specifying whether to print automatically in
 // kiosk mode. See http://crbug.com/31395.
 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.
 const char kDefaultDestinationSelectionRules[] =
     "defaultDestinationSelectionRules";
 
 // Id of the predefined PDF printer.
 const char kLocalPdfPrinterId[] = "Save as PDF";
 
 // Timeout for searching for privet printers, in seconds.
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   }
 
   ResolveJavascriptCallback(base::Value(callback_id), printers);
 }
 
 void PrintPreviewHandler::SendCloudPrintEnabled() {
   Profile* profile = Profile::FromBrowserContext(
       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()));
   }
 }
 
 void PrintPreviewHandler::SendCloudPrintJob(const std::string& callback_id,
                                             const base::RefCountedBytes* data) {
   // BASE64 encode the job data.
   const base::StringPiece raw_data(reinterpret_cast<const char*>(data->front()),
                                    data->size());
   std::string base64_data;
   base::Base64Encode(raw_data, &base64_data);
@@ skipping 447 matching lines @@
 
 void PrintPreviewHandler::UnregisterForGaiaCookieChanges() {
   if (gaia_cookie_manager_service_)
     gaia_cookie_manager_service_->RemoveObserver(this);
 }
 
 void PrintPreviewHandler::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   pdf_file_saved_closure_ = closure;
 }