Add hooks for capturing meaningful text info, gently.

public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 178 matching lines @@
     // is the newly focused node. Either can be null.
     virtual void focusedNodeChanged(const WebNode& fromNode, const WebNode& toNode) { }
 
     // Indicates two things:
     //   1) This view may have a new layout now.
     //   2) Calling layout() is a no-op.
     // After calling WebWidget::layout(), expect to get this notification
     // unless the view did not need a layout.
     virtual void didUpdateLayout() { }
 
+    // The frame's document finished layout immediately after the parsing finished.
+    // Another way to put it: first frame after DOMContentLoaded is dispatched.
+    virtual void didFirstLayoutAfterFinishedParsing() { }

[nasko, 2015/08/24 22:57:50]

Is there a reason this method isn't on WebFrameClient? Even the comment on it
talks about the "frame's document".

+
     // Return true to swallow the input event if the embedder will start a disambiguation popup
     virtual bool didTapMultipleTargets(const WebSize& pinchViewportOffset, const WebRect& touchRect, const WebVector<WebRect>& targetRects) { return false; }
 
     // Returns comma separated list of accept languages.
     virtual WebString acceptLanguages() { return WebString(); }
 
 
     // Session history -----------------------------------------------------
 
     // Tells the embedder to navigate back or forward in session history by
@@ skipping 60 matching lines @@
     // Informs the browser that the draggable regions have been updated.
     virtual void draggableRegionsChanged() { }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif