Print Preview: Always enable the internal PDF plugin for print preview.

content/browser/plugin_service.h

 // 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.
 
 // This class responds to requests from renderers for the list of plugins, and
 // also a proxy object for plugin instances.
 
 #ifndef CONTENT_BROWSER_PLUGIN_SERVICE_H_
 #define CONTENT_BROWSER_PLUGIN_SERVICE_H_
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/hash_tables.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/singleton.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "build/build_config.h"
 #include "content/browser/plugin_process_host.h"
@@ skipping 70 matching lines @@
 
   // Gets the plugin in the list of plugins that matches the given url and mime
   // type.  Must be called on the FILE thread.
   bool GetPluginInfo(int render_process_id,
                      int render_view_id,
                      const GURL& url,
                      const std::string& mime_type,
                      webkit::WebPluginInfo* info,
                      std::string* actual_mime_type);
 
-  // Safe to be called from any thread.
+  // Safe to be called from any thread. If |plugin| has an empty |url| field,

[jam, 2011/08/16 00:45:54]

nit: this comment belongs above OverriddenPlugin::url. Also, to be precise it
should say "render view" instead of "tab", since if the user navigates in that
tab to a pdf, we'll still use reader.

+  // then the override applies to all urls in that tab.
   void OverridePluginForTab(const OverriddenPlugin& plugin);
 
   // Restricts the given plugin to the the scheme and host of the given url.
   // Call with an empty url to reset this.
   // Can be called on any thread.
   void RestrictPluginToUrl(const FilePath& plugin_path, const GURL& url);
 
   // Returns true if the given plugin is allowed to be used by a page with
   // the given URL.
   // Can be called on any thread.
@@ skipping 74 matching lines @@
 
   std::vector<OverriddenPlugin> overridden_plugins_;
   base::Lock overridden_plugins_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginService);
 };
 
 DISABLE_RUNNABLE_METHOD_REFCOUNT(PluginService);
 
 #endif  // CONTENT_BROWSER_PLUGIN_SERVICE_H_