Store plug-in enabled/disabled state in PluginPrefs instead of WebPluginInfo.

chrome/browser/printing/print_preview_tab_controller.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/printing/print_preview_tab_controller.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/utf_string_conversions.h"
@@ skipping 34 matching lines @@
   PluginGroup* internal_pdf_group = NULL;
   std::vector<PluginGroup> plugin_groups;
   PluginList::Singleton()->GetPluginGroups(false, &plugin_groups);
   for (size_t i = 0; i < plugin_groups.size(); ++i) {
     if (plugin_groups[i].GetGroupName() == internal_pdf_group_name) {
       internal_pdf_group = &plugin_groups[i];
       break;
     }
   }
   if (internal_pdf_group) {
-    std::vector<WebPluginInfo> plugins = internal_pdf_group->web_plugin_infos();
+    const std::vector<WebPluginInfo>& plugins =
+        internal_pdf_group->web_plugin_infos();
     DCHECK_EQ(plugins.size(), 1U);
 
     webkit::WebPluginInfo plugin = plugins[0];
-    plugin.enabled = WebPluginInfo::USER_ENABLED;
     ChromePluginServiceFilter::GetInstance()->OverridePluginForTab(
         preview_tab->render_view_host()->process()->id(),
         preview_tab->render_view_host()->routing_id(),
         GURL(),
         plugin);
   }
 }
 
 void ResetPreviewTabOverrideTitle(TabContentsWrapper* preview_tab) {
   preview_tab->print_view_manager()->ResetTitleOverride();
@@ skipping 315 matching lines @@
   RenderProcessHost* rph = tab->render_view_host()->process();
   if (registrar_.IsRegistered(this,
                               content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                               Source<RenderProcessHost>(rph))) {
     registrar_.Remove(this, content::NOTIFICATION_RENDERER_PROCESS_CLOSED,
                       Source<RenderProcessHost>(rph));
   }
 }
 
 }  // namespace printing