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

chrome/renderer/render_view.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/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 3802 matching lines @@
   if (!webview())
     return;
   WebFrame* main_frame = webview()->mainFrame();
   if (!main_frame)
     return;
 
   main_frame->enableViewSourceMode(true);
 }
 
 void RenderView::OnEnablePreferredSizeChangedMode() {
-  DCHECK(!send_preferred_size_changes_);
+  if (send_preferred_size_changes_)
+    return;
+
   send_preferred_size_changes_ = true;
-
-  if (ViewType::ShouldAutoResize(view_type_))
-    preferred_size_change_timer_.Start(TimeDelta::FromMilliseconds(10), this,
-                                       &RenderView::CheckPreferredSize);
+  preferred_size_change_timer_.Start(TimeDelta::FromMilliseconds(10), this,

[Matt Perry, 2010/05/05 23:47:38]

I remember not liking this polling when it first went in. Aaron, what happened
to the webkit change that would remove the need for this?

+                                     &RenderView::CheckPreferredSize);
 }
 
 void RenderView::OnDisableScrollbarsForSmallWindows(
     const gfx::Size& disable_scrollbar_size_limit) {
   disable_scrollbars_size_limit_ = disable_scrollbar_size_limit;
 }
 
 void RenderView::OnSetRendererPrefs(const RendererPreferences& renderer_prefs) {
   renderer_preferences_ = renderer_prefs;
   UpdateFontRenderingFromRendererPrefs();
@@ skipping 1099 matching lines @@
 
     if (last_top_level_navigation_page_id_ != page_id_ &&
         // Not interested in reloads.
         type != WebKit::WebNavigationTypeReload &&
         type != WebKit::WebNavigationTypeFormSubmitted) {
       return true;
     }
   }
   return false;
 }