Remove BrowserPlugin's -internal-attach method

chrome/common/extensions/chrome_extension_messages.h

 // Copyright 2014 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.
 
 // Chrome-specific IPC messages for extensions.
 // Extension-related messages that aren't specific to Chrome live in
 // extensions/common/extension_messages.h.
 //
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "base/strings/string16.h"
+#include "base/values.h"
 #include "chrome/common/extensions/api/webstore/webstore_api_constants.h"
 #include "chrome/common/extensions/webstore_install_result.h"
 #include "chrome/common/web_application_info.h"
 #include "extensions/common/stack_frame.h"
 #include "ipc/ipc_message_macros.h"
 #include "url/gurl.h"
 
 #define IPC_MESSAGE_START ChromeExtensionMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(extensions::api::webstore::InstallStage,
@@ skipping 82 matching lines @@
 // Sent by the renderer to implement chrome.webstore.install().
 IPC_MESSAGE_ROUTED5(ExtensionHostMsg_InlineWebstoreInstall,
                     int32 /* install id */,
                     int32 /* return route id */,
                     std::string /* Web Store item ID */,
                     GURL /* requestor URL */,
                     int /* listeners_mask */)
 
 IPC_MESSAGE_ROUTED1(ChromeExtensionHostMsg_DidGetApplicationInfo,
                     WebApplicationInfo)
+
+// Sent by the renderer to set initialization parameters of a Browser Plugin
+// that is identified by |element_instance_id|.
+IPC_MESSAGE_CONTROL4(ChromeExtensionHostMsg_GuestViewSetAttachParams,
+                    int /* routing_id */,
+                    int /* element_instance_id */,
+                    int /* guest_instance_id */,
+                    base::DictionaryValue /* attach_params */)