Expose WebPageImportanceSignals to embedder

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 3816 matching lines @@
 #if USE(DEFAULT_RENDER_THEME)
     LayoutThemeDefault::setSelectionColors(activeBackgroundColor, activeForegroundColor, inactiveBackgroundColor, inactiveForegroundColor);
     LayoutTheme::theme().platformColorsDidChange();
 #endif
 }
 
 void WebViewImpl::didCommitLoad(bool isNewNavigation, bool isNavigationWithinPage)
 {
     if (isNewNavigation && !isNavigationWithinPage) {
         pageScaleConstraintsSet().setNeedsReset(true);
-        pageImportanceSignals().onCommitLoad();
+        m_pageImportanceSignals.onCommitLoad();
+        if (m_client)
+            m_client->pageImportanceSignalsChanged();

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

Can we move the pageImportanceSignalsChanged call into onCommitLoad?

     }
 
     // Give the visual viewport's scroll layer its initial size.
     page()->frameHost().visualViewport().mainFrameDidChangeSize();
 
     // Make sure link highlight from previous page is cleared.
     m_linkHighlights.clear();
     endActiveFlingAnimation();
     m_userGestureObserved = false;
 }
@@ skipping 165 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay.clear();
 
     if (color == Color::transparent)
         return;
 
     m_pageColorOverlay = PageOverlay::create(this, new ColorOverlay(color));
     m_pageColorOverlay->update();
 }
 
+WebPageImportanceSignals* WebViewImpl::pageImportanceSignals()
+{
+    return &m_pageImportanceSignals;
+}
+
 Element* WebViewImpl::focusedElement() const
 {
     Frame* frame = m_page->focusController().focusedFrame();
     if (!frame || !frame->isLocalFrame())
         return 0;
 
     Document* document = toLocalFrame(frame)->document();
     if (!document)
         return 0;
 
@@ skipping 386 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlayImpl* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink