Add policy to use system default printer

chrome/browser/ui/webui/print_preview/print_preview_ui.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_ui.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
+#include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/id_map.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/printing/background_printing_manager.h"
 #include "chrome/browser/printing/print_preview_data_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/metrics_handler.h"
 #include "chrome/browser/ui/webui/print_preview/print_preview_handler.h"
 #include "chrome/browser/ui/webui/theme_source.h"
 #include "chrome/common/chrome_features.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/browser_resources.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
+#include "components/prefs/pref_service.h"
 #include "components/printing/common/print_messages.h"
 #include "components/strings/grit/components_strings.h"
 #include "content/public/browser/url_data_source.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "extensions/common/constants.h"
 #include "printing/features/features.h"
 #include "printing/page_size_margins.h"
 #include "printing/print_job_constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/web_dialogs/web_dialog_delegate.h"
 #include "ui/web_dialogs/web_dialog_ui.h"
 
-#if defined(OS_CHROMEOS)
-#include "base/command_line.h"
-#include "chrome/common/chrome_switches.h"
-#endif
-
 using content::WebContents;
 using printing::PageSizeMargins;
 
 namespace {
 
 #if defined(OS_MACOSX)
 // U+0028 U+21E7 U+2318 U+0050 U+0029 in UTF8
 const char kBasicPrintShortcut[] = "\x28\xE2\x8c\xA5\xE2\x8C\x98\x50\x29";
 #elif !defined(OS_CHROMEOS)
 const char kBasicPrintShortcut[] = "(Ctrl+Shift+P)";
@@ skipping 91 matching lines @@
   if (data.get()) {
     callback.Run(data.get());
     return true;
   }
   // Invalid request.
   scoped_refptr<base::RefCountedBytes> empty_bytes(new base::RefCountedBytes);
   callback.Run(empty_bytes.get());
   return true;
 }
 
-content::WebUIDataSource* CreatePrintPreviewUISource() {
+content::WebUIDataSource* CreatePrintPreviewUISource(Profile* profile) {
   content::WebUIDataSource* source =
       content::WebUIDataSource::Create(chrome::kChromeUIPrintHost);
 #if defined(OS_CHROMEOS)
   source->AddLocalizedString("title",
                              IDS_PRINT_PREVIEW_GOOGLE_CLOUD_PRINT_TITLE);
 #else
   source->AddLocalizedString("title", IDS_PRINT_PREVIEW_TITLE);
 #endif
   source->AddLocalizedString("loading", IDS_PRINT_PREVIEW_LOADING);
   source->AddLocalizedString("noPlugin", IDS_PRINT_PREVIEW_NO_PLUGIN);
@@ skipping 239 matching lines @@
       features::kPrintPdfAsImage);
   source->AddBoolean("printPdfAsImageEnabled", print_pdf_as_image_enabled);
 #else
   source->AddBoolean("printPdfAsImageEnabled", false);
 #endif
 #if defined(OS_CHROMEOS)
   bool cups_and_md_settings_enabled =
       !base::CommandLine::ForCurrentProcess()->HasSwitch(
           ::switches::kDisableNativeCups);
   source->AddBoolean("showLocalManageButton", cups_and_md_settings_enabled);
+  source->AddBoolean("useSystemDefaultPrinter", false);
 #else
   source->AddBoolean("showLocalManageButton", true);
+  bool system_default_printer = profile->GetPrefs()->GetBoolean(
+      prefs::kPrintPreviewUseSystemDefaultPrinter);
+  source->AddBoolean("useSystemDefaultPrinter", system_default_printer);
 #endif
   return source;
 }
 
 }  // namespace
 
 PrintPreviewUI::PrintPreviewUI(content::WebUI* web_ui)
     : ConstrainedWebDialogUI(web_ui),
       initial_preview_start_time_(base::TimeTicks::Now()),
       id_(g_print_preview_ui_id_map.Get().Add(this)),
       handler_(nullptr),
       source_is_modifiable_(true),
       source_has_selection_(false),
       print_selection_only_(false),
       dialog_closed_(false) {
   // Set up the chrome://print/ data source.
   Profile* profile = Profile::FromWebUI(web_ui);
-  content::WebUIDataSource::Add(profile, CreatePrintPreviewUISource());
+  content::WebUIDataSource::Add(profile, CreatePrintPreviewUISource(profile));
 
   // Set up the chrome://theme/ source.
   content::URLDataSource::Add(profile, new ThemeSource(profile));
 
   auto handler = base::MakeUnique<PrintPreviewHandler>();
   handler_ = handler.get();
   web_ui->AddMessageHandler(std::move(handler));
   web_ui->AddMessageHandler(base::MakeUnique<MetricsHandler>());
 
   g_print_preview_request_id_map.Get().Set(id_, -1);
@@ skipping 230 matching lines @@
 }
 
 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
   handler_->FileSelected(path, 0, NULL);
 }
 
 void PrintPreviewUI::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   handler_->SetPdfSavedClosureForTesting(closure);
 }