Rework tree APIs to reflect Google style and more const-correctness....

chrome/browser/ui/views/download_item_view.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/ui/views/download_item_view.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/file_path.h"
@@ skipping 375 matching lines @@
     default:
       NOTREACHED();
   }
 
   status_text_ = UTF16ToWideHack(status_text);
   UpdateAccessibleName();
 
   // We use the parent's (DownloadShelfView's) SchedulePaint, since there
   // are spaces between each DownloadItemView that the parent is responsible
   // for painting.
-  GetParent()->SchedulePaint();
+  parent()->SchedulePaint();
 }
 
 void DownloadItemView::OnDownloadOpened(DownloadItem* download) {
   disabled_while_opening_ = true;
   SetEnabled(false);
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       reenable_method_factory_.NewRunnableMethod(&DownloadItemView::Reenable),
       kDisabledOnOpenDuration);
 
@@ skipping 547 matching lines @@
   // open downloads super quickly, we should be concerned about clickjacking.
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.open_download",
                            base::Time::Now() - creation_time_);
   download_->OpenDownload();
   UpdateAccessibleName();
 }
 
 void DownloadItemView::OnExtractIconComplete(IconManager::Handle handle,
                                              SkBitmap* icon_bitmap) {
   if (icon_bitmap)
-    GetParent()->SchedulePaint();
+    parent()->SchedulePaint();
 }
 
 void DownloadItemView::LoadIcon() {
   IconManager* im = g_browser_process->icon_manager();
   im->LoadIcon(download_->GetUserVerifiedFilePath(),
                IconLoader::SMALL, &icon_consumer_,
                NewCallback(this, &DownloadItemView::OnExtractIconComplete));
 }
 
 bool DownloadItemView::GetTooltipText(const gfx::Point& p,
@@ skipping 99 matching lines @@
 
   // If the name has changed, call SetAccessibleName and notify
   // assistive technology that the name has changed so they can
   // announce it immediately.
   if (new_name != current_name) {
     SetAccessibleName(new_name);
     if (GetWidget())
       NotifyAccessibilityEvent(AccessibilityTypes::EVENT_NAME_CHANGED);
   }
 }