GuestView: Decouple extension IPCs from soon-to-be component IPCs

extensions/common/guest_view/extensions_guest_view_messages.h

+// Copyright 2015 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 extensions GuestViews.
+// Multiply-included message file, hence no include guard.
+
+#include <string>
+
+#include "ipc/ipc_message_macros.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/ipc/gfx_param_traits.h"
+
+#define IPC_MESSAGE_START ExtensionsGuestViewMsgStart
+// Messages sent from the browser to the renderer.
+
+// The ACK for GuestViewHostMsg_CreateMimeHandlerViewGuest.
+IPC_MESSAGE_CONTROL1(ExtensionsGuestViewMsg_CreateMimeHandlerViewGuestACK,
+                     int /* element_instance_id */)
+
+// Once a MimeHandlerView guest's JavaScript onload function has been called,
+// this IPC is sent to the container to notify it.
+IPC_MESSAGE_CONTROL1(ExtensionsGuestViewMsg_MimeHandlerViewGuestOnLoadCompleted,
+                     int /* element_instance_id */)
+
+// Messages sent from the renderer to the browser.
+
+// Queries whether the RenderView of the provided |routing_id| is allowed to

[lazyboy, 2015/04/21 17:32:58]

Thanks for adding the description.

+// inject the script with the provided |script_id|.
+IPC_SYNC_MESSAGE_CONTROL2_1(
+    ExtensionsGuestViewHostMsg_CanExecuteContentScriptSync,
+    int /* routing_id */,
+    int /* script_id */,
+    bool /* allowed */)
+
+// Tells the browser to create a mime handler guest view for a plugin.
+IPC_MESSAGE_CONTROL4(ExtensionsGuestViewHostMsg_CreateMimeHandlerViewGuest,
+                     int /* render_frame_id */,
+                     std::string /* view_id */,
+                     int /* element_instance_id */,
+                     gfx::Size /* element_size */)
+
+// A renderer sends this message when it wants to resize a guest.
+IPC_MESSAGE_CONTROL3(ExtensionsGuestViewHostMsg_ResizeGuest,
+                     int /* routing_id */,
+                     int /* element_instance_id*/,
+                     gfx::Size /* new_size */)