The app launcher had a height of zero as it was not getting preferred size up...

chrome/browser/views/app_launcher.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/views/app_launcher.h"
 
 #include <string>
 #include <vector>
 
 #include "app/resource_bundle.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "base/task.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/profile.h"
-#include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/view_ids.h"
 #include "chrome/browser/views/dom_view.h"
 #include "chrome/browser/views/info_bubble.h"
 #include "chrome/browser/views/frame/browser_view.h"
 #include "chrome/browser/views/location_bar/location_bar_view.h"
 #include "chrome/common/url_constants.h"
 #include "views/widget/root_view.h"
 
 #if defined(OS_CHROMEOS)
@@ skipping 129 matching lines @@
     return;
 
   DCHECK(!dom_view_);
   dom_view_ = new DOMView();
   AddChildView(dom_view_);
   // We pass NULL for site instance so the renderer uses its own process.
   dom_view_->Init(app_launcher_->browser()->profile(), NULL);
   // We make the AppLauncher the TabContents delegate so we get notifications
   // from the page to open links.
   dom_view_->tab_contents()->set_delegate(app_launcher_);
-  dom_view_->tab_contents()->render_view_host()->
-      EnablePreferredSizeChangedMode();
   GURL url = GetMenuURL();
   std::string ref = url.ref();
   if (!app_launcher_->hash_params().empty()) {
     if (!ref.empty())
       ref += "&";
     ref += app_launcher_->hash_params();
 
     url_canon::Replacements<char> replacements;
     replacements.SetRef(ref.c_str(), url_parse::Component(0, ref.size()));
     url = url.ReplaceComponents(replacements);
@@ skipping 169 matching lines @@
                               NULL, std::string());
       break;
     }
   }
 #else
   browser_->AddTabWithURL(url, GURL(), transition, -1,
                           Browser::ADD_SELECTED | Browser::ADD_FORCE_INDEX,
                           NULL, std::string());
 #endif
 }