Organize Layout Hooks (content-side).

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 "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "content/common/content_export.h"
@@ skipping 983 matching lines @@
                     GURL /* url */,
                     bool /* user_gesture */)
 
 // PlzNavigate
 // Tells the browser to perform a navigation.
 IPC_MESSAGE_ROUTED3(FrameHostMsg_BeginNavigation,
                     content::CommonNavigationParams,
                     content::BeginNavigationParams,
                     scoped_refptr<content::ResourceRequestBody>)
 
-// Sent once a paint happens after the first non empty layout. In other words
-// after the frame has painted something.
-IPC_MESSAGE_ROUTED0(FrameHostMsg_DidFirstVisuallyNonEmptyPaint)
-
 // Sent as a response to FrameMsg_VisualStateRequest.
 // The message is delivered using RenderWidget::QueueMessage.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_VisualStateResponse, uint64 /* id */)
 
 // Puts the browser into "tab fullscreen" mode for the sending renderer.
 // See the comment in chrome/browser/ui/browser.h for more details.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ToggleFullscreen, bool /* enter_fullscreen */)
 
 // Dispatch a load event for this frame in the iframe element of an
 // out-of-process parent frame.
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DispatchLoad)
 
 // Sent to the browser from a frame proxy to post a message to the frame's
 // active renderer.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_RouteMessageEvent,
                     FrameMsg_PostMessage_Params)
 
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 
 // Message to show/hide a popup menu using native controls.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #endif