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

chrome/browser/ui/views/tabs/base_tab.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/tabs/base_tab.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 40 matching lines @@
     // Explicitly mark midle-mouse clicks as non-handled to ensure the tab
     // sees them.
     return event.IsOnlyMiddleMouseButton() ? false : handled;
   }
 
   // We need to let the parent know about mouse state so that it
   // can highlight itself appropriately. Note that Exit events
   // fire before Enter events, so this works.
   virtual void OnMouseEntered(const views::MouseEvent& event) {
     CustomButton::OnMouseEntered(event);
-    GetParent()->OnMouseEntered(event);
+    parent()->OnMouseEntered(event);
   }
 
   virtual void OnMouseExited(const views::MouseEvent& event) {
     CustomButton::OnMouseExited(event);
-    GetParent()->OnMouseExited(event);
+    parent()->OnMouseExited(event);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TabCloseButton);
 };
 
 }  // namespace
 
 // static
 gfx::Font* BaseTab::font_ = NULL;
@@ skipping 391 matching lines @@
 // static
 void BaseTab::InitResources() {
   static bool initialized = false;
   if (!initialized) {
     initialized = true;
     font_ = new gfx::Font(
         ResourceBundle::GetSharedInstance().GetFont(ResourceBundle::BaseFont));
     font_height_ = font_->GetHeight();
   }
 }