[HBD] Remove PluginCache and reload plugin list when origin changes

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1205 matching lines @@
 // Notification sent from a renderer to the browser that a Pepper plugin
 // instance has started playback.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperStartsPlayback,
                     int32_t /* pp_instance */)
 
 // Notification sent from a renderer to the browser that a Pepper plugin
 // instance has stopped playback.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_PepperStopsPlayback,
                     int32_t /* pp_instance */)
 
-// Used to get the list of plugins
-IPC_SYNC_MESSAGE_CONTROL1_1(FrameHostMsg_GetPlugins,
-    bool /* refresh*/,
-    std::vector<content::WebPluginInfo> /* plugins */)
+// Used to get the list of plugins. |main_frame_origin| is used to handle
+// exceptions for Plugins Content Settings.

[alexmos, 2016/08/04 05:32:03]

nit: s/Plugins Content Settings/plugin content settings/

[trizzofo, 2016/08/05 02:04:25]

Done.

+IPC_SYNC_MESSAGE_CONTROL2_1(FrameHostMsg_GetPlugins,
+                            bool /* refresh*/,
+                            url::Origin /* main_frame_origin */,
+                            std::vector<content::WebPluginInfo> /* plugins */)
 
 // Return information about a plugin for the given URL and MIME
 // type. If there is no matching plugin, |found| is false.
 // |actual_mime_type| is the actual mime type supported by the
 // found plugin.
 IPC_SYNC_MESSAGE_CONTROL4_3(FrameHostMsg_GetPluginInfo,
                             int /* render_frame_id */,
                             GURL /* url */,
                             GURL /* page_url */,
                             std::string /* mime_type */,
@@ skipping 332 matching lines @@
 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.