Eliminate all UI thread decoding of extension images....

chrome/browser/extensions/extension_action_context_menu_model.h

Index: chrome/browser/extensions/extension_action_context_menu_model.h
===================================================================
--- chrome/browser/extensions/extension_action_context_menu_model.h	(revision 42238)
+++ chrome/browser/extensions/extension_action_context_menu_model.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -61,6 +61,9 @@
   // The delegate which handles the 'inspect popup' menu command.
   MenuDelegate* delegate_;
 
+  // Keeps track of the extension install UI.
+  scoped_ptr<ExtensionInstallUI> install_ui_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionActionContextMenuModel);
 };