Cleanup: Fix some misc nits in printing code.

chrome/browser/printing/print_preview_dialog_controller.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/printing/print_preview_dialog_controller.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 82 matching lines @@
     std::vector<WebUIMessageHandler*>* /* handlers */) const {
   // PrintPreviewUI adds its own message handlers.
 }
 
 void PrintPreviewDialogDelegate::GetDialogSize(gfx::Size* size) const {
   DCHECK(size);
   const gfx::Size kMinDialogSize(800, 480);
   const int kBorder = 25;
   *size = kMinDialogSize;
 
-  web_modal::WebContentsModalDialogHost* host = NULL;
+  web_modal::WebContentsModalDialogHost* host = nullptr;
   content::WebContents* outermost_web_contents =
       guest_view::GuestViewBase::GetTopLevelWebContents(initiator_);
   Browser* browser = chrome::FindBrowserWithWebContents(outermost_web_contents);
   if (browser)
     host = browser->window()->GetWebContentsModalDialogHost();
 
   if (host)
     size->SetToMax(host->GetMaximumDialogSize());
   else
     size->SetToMax(outermost_web_contents->GetContainerBounds().size());
@@ skipping 29 matching lines @@
 namespace printing {
 
 PrintPreviewDialogController::PrintPreviewDialogController()
     : waiting_for_new_preview_page_(false),
       is_creating_print_preview_dialog_(false) {
 }
 
 // static
 PrintPreviewDialogController* PrintPreviewDialogController::GetInstance() {
   if (!g_browser_process)
-    return NULL;
+    return nullptr;
   return g_browser_process->print_preview_dialog_controller();
 }
 
 // static
 void PrintPreviewDialogController::PrintPreview(WebContents* initiator) {
   if (initiator->ShowingInterstitialPage())
     return;
 
   PrintPreviewDialogController* dialog_controller = GetInstance();
   if (!dialog_controller)
@@ skipping 26 matching lines @@
 
   for (it = preview_dialog_map_.begin();
        it != preview_dialog_map_.end();
        ++it) {
     // If |contents| is an initiator.
     if (contents == it->second) {
       // Return the associated preview dialog.
       return it->first;
     }
   }
-  return NULL;
+  return nullptr;
 }
 
 WebContents* PrintPreviewDialogController::GetInitiator(
     WebContents* preview_dialog) {
   PrintPreviewDialogMap::iterator it = preview_dialog_map_.find(preview_dialog);
-  return (it != preview_dialog_map_.end()) ? it->second : NULL;
+  return (it != preview_dialog_map_.end()) ? it->second : nullptr;
 }
 
 void PrintPreviewDialogController::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   if (type == content::NOTIFICATION_RENDERER_PROCESS_CLOSED) {
     OnRendererProcessClosed(
         content::Source<content::RenderProcessHost>(source).ptr());
   } else if (type == content::NOTIFICATION_WEB_CONTENTS_DESTROYED) {
@@ skipping 28 matching lines @@
           url.host() == chrome::kChromeUIPrintHost);
 }
 
 void PrintPreviewDialogController::EraseInitiatorInfo(
     WebContents* preview_dialog) {
   PrintPreviewDialogMap::iterator it = preview_dialog_map_.find(preview_dialog);
   if (it == preview_dialog_map_.end())
     return;
 
   RemoveObservers(it->second);
-  preview_dialog_map_[preview_dialog] = NULL;
+  preview_dialog_map_[preview_dialog] = nullptr;
 }
 
 PrintPreviewDialogController::~PrintPreviewDialogController() {}
 
 void PrintPreviewDialogController::OnRendererProcessClosed(
     content::RenderProcessHost* rph) {
   // Store contents in a vector and deal with them after iterating through
   // |preview_dialog_map_| because RemoveFoo() can change |preview_dialog_map_|.
   std::vector<WebContents*> closed_initiators;
   std::vector<WebContents*> closed_preview_dialogs;
@@ skipping 153 matching lines @@
   }
 }
 
 void PrintPreviewDialogController::RemoveInitiator(
     WebContents* initiator) {
   WebContents* preview_dialog = GetPrintPreviewForContents(initiator);
   DCHECK(preview_dialog);
   // Update the map entry first, so when the print preview dialog gets destroyed
   // and reaches RemovePreviewDialog(), it does not attempt to also remove the
   // initiator's observers.
-  preview_dialog_map_[preview_dialog] = NULL;
+  preview_dialog_map_[preview_dialog] = nullptr;
   RemoveObservers(initiator);
 
   PrintViewManager::FromWebContents(initiator)->PrintPreviewDone();
 
   // initiator is closed. Close the print preview dialog too.
   if (content::WebUI* web_ui = preview_dialog->GetWebUI()) {
     PrintPreviewUI* print_preview_ui =
         static_cast<PrintPreviewUI*>(web_ui->GetController());
     if (print_preview_ui)
       print_preview_ui->OnInitiatorClosed();
@@ skipping 16 matching lines @@
         static_cast<PrintPreviewUI*>(web_ui->GetController());
     if (print_preview_ui)
       print_preview_ui->OnPrintPreviewDialogDestroyed();
   }
 
   preview_dialog_map_.erase(preview_dialog);
   RemoveObservers(preview_dialog);
 }
 
 }  // namespace printing