Expose WebPageImportanceSignals to embedder

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
@@ skipping 915 matching lines @@
     if (webframe->autofillClient())
         webframe->autofillClient()->textFieldDidReceiveKeyDown(WebInputElement(&inputElement), WebKeyboardEventBuilder(event));
 }
 
 void ChromeClientImpl::didChangeValueInTextField(HTMLFormControlElement& element)
 {
     WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(element.document().frame());
     if (webframe->autofillClient())
         webframe->autofillClient()->textFieldDidChange(WebFormControlElement(&element));
 
-    m_webView->pageImportanceSignals().setHadFormInteraction();
+    m_webView->pageImportanceSignals()->setHadFormInteraction();
+    if (m_webView->client())
+        m_webView->client()->pageImportanceSignalsChanged();

[tkent, 2015/09/15 23:16:42]

Can we move the pageImportanceSignalsChanged call into setHadFormInteraction?

 }
 
 void ChromeClientImpl::didEndEditingOnTextField(HTMLInputElement& inputElement)
 {
     WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(inputElement.document().frame());
     if (webframe->autofillClient())
         webframe->autofillClient()->textFieldDidEndEditing(WebInputElement(&inputElement));
 }
 
 void ChromeClientImpl::openTextDataListChooser(HTMLInputElement& input)
@@ skipping 48 matching lines @@
     for (const auto& observer : observers)
         observer->willOpenPopup();
 }
 
 FloatSize ChromeClientImpl::elasticOverscroll() const
 {
     return m_webView->elasticOverscroll();
 }
 
 } // namespace blink