Print Preview: Display a throbber when the user requests the system print

chrome/browser/automation/automation_provider_win.cc

 // Copyright (c) 2011 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/automation/automation_provider.h"
 
 #include "base/debug/trace_event.h"
 #include "base/json/json_reader.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/automation/automation_browser_tracker.h"
@@ skipping 288 matching lines @@
   // This message expects no response.
 }
 
 void AutomationProvider::PrintAsync(int tab_handle) {
   TabContents* tab_contents = GetTabContentsForHandle(tab_handle, NULL);
   if (!tab_contents)
     return;
 
   TabContentsWrapper* wrapper =
       TabContentsWrapper::GetCurrentWrapperForContents(tab_contents);
-  wrapper->print_view_manager()->PrintNow();
+  wrapper->print_view_manager()->PrintNow(NULL);
 }
 
 ExternalTabContainer* AutomationProvider::GetExternalTabForHandle(int handle) {
   if (tab_tracker_->ContainsHandle(handle)) {
     NavigationController* tab = tab_tracker_->GetResource(handle);
     return ExternalTabContainer::GetContainerForTab(
         tab->tab_contents()->GetNativeView());
   }
 
   return NULL;
@@ skipping 143 matching lines @@
 void AutomationProvider::OnSetZoomLevel(int handle, int zoom_level) {
   if (tab_tracker_->ContainsHandle(handle)) {
     NavigationController* tab = tab_tracker_->GetResource(handle);
     if (tab->tab_contents() && tab->tab_contents()->render_view_host()) {
       RenderViewHost* host = tab->tab_contents()->render_view_host();
       PageZoom::Function zoom = static_cast<PageZoom::Function>(zoom_level);
       host->Send(new ViewMsg_Zoom(host->routing_id(), zoom));
     }
   }
 }