Remove 'WebPlugin::CheckIfRunInsecureContent'.

content/child/plugin_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.
 //
 // Multiply-included message file, hence no include guard.
 
 #include <stdint.h>
 
 #include "build/build_config.h"
 #include "content/child/plugin_param_traits.h"
@@ skipping 220 matching lines @@
 
 IPC_SYNC_MESSAGE_CONTROL1_0(PluginHostMsg_SetException,
                             std::string /* message */)
 
 IPC_MESSAGE_CONTROL0(PluginHostMsg_PluginShuttingDown)
 
 IPC_MESSAGE_ROUTED2(PluginHostMsg_URLRedirectResponse,
                     bool /* allow */,
                     int  /* resource_id */)
 
-IPC_SYNC_MESSAGE_ROUTED1_1(PluginHostMsg_CheckIfRunInsecureContent,
-                           GURL /* url */,
-                           bool /* result */)
-
 #if defined(OS_WIN)
 // The modal_loop_pump_messages_event parameter is an event handle which is
 // passed in for windowless plugins and is used to indicate if messages
 // are to be pumped in sync calls to the plugin process. Currently used
 // in HandleEvent calls.
 IPC_SYNC_MESSAGE_ROUTED2_0(PluginHostMsg_SetWindowlessData,
                            HANDLE /* modal_loop_pump_messages_event */,
                            gfx::NativeViewId /* dummy_activation_window*/)
 
 // Send the IME status retrieved from a windowless plugin. A windowless plugin
@@ skipping 82 matching lines @@
 IPC_SYNC_MESSAGE_ROUTED1_2(NPObjectMsg_Construct,
                            std::vector<content::NPVariant_Param> /* args */,
                            content::NPVariant_Param /* result_param */,
                            bool /* result */)
 
 IPC_SYNC_MESSAGE_ROUTED2_2(NPObjectMsg_Evaluate,
                            std::string /* script */,
                            bool /* popups_allowed */,
                            content::NPVariant_Param /* result_param */,
                            bool /* result */)