Implement print preview tab controller.

chrome/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2010 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/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
@@ skipping 41 matching lines @@
 #include "chrome/browser/message_box_handler.h"
 #include "chrome/browser/load_from_memory_cache_details.h"
 #include "chrome/browser/load_notification_details.h"
 #include "chrome/browser/metrics/metric_event_duration_details.h"
 #include "chrome/browser/modal_html_dialog_delegate.h"
 #include "chrome/browser/omnibox_search_hint.h"
 #include "chrome/browser/password_manager/password_manager.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/plugin_installer.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/printing/print_view_manager.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/browser/renderer_host/resource_request_details.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/browser/renderer_host/web_cache_manager.h"
 #include "chrome/browser/renderer_preferences_util.h"
 #include "chrome/browser/search_engines/template_url.h"
@@ skipping 1273 matching lines @@
 
 void TabContents::EmailPageLocation() {
   std::string title = EscapeQueryParamValue(UTF16ToUTF8(GetTitle()), false);
   std::string page_url = EscapeQueryParamValue(GetURL().spec(), false);
   std::string mailto = std::string("mailto:?subject=Fwd:%20") +
       title + "&body=%0A%0A" + page_url;
   platform_util::OpenExternal(GURL(mailto));
 }
 
 void TabContents::PrintPreview() {
-  // We don't show the print preview yet, only the print dialog.
-  PrintNow();
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnablePrintPreview)) {
+    if (showing_interstitial_page())
+      return;
+    render_view_host()->PrintPreview();
+  } else {
+    PrintNow();
+  }
 }
 
 bool TabContents::PrintNow() {
   // We can't print interstitial page for now.
   if (showing_interstitial_page())
     return false;
 
   return render_view_host()->PrintPages();
 }
 
@@ skipping 1959 matching lines @@
   AddInfoBar(new SavePasswordInfoBarDelegate(this, form_to_save));
 }
 
 Profile* TabContents::GetProfileForPasswordManager() {
   return profile();
 }
 
 bool TabContents::DidLastPageLoadEncounterSSLErrors() {
   return controller().ssl_manager()->ProcessedSSLErrorFromRequest();
 }