Expose WebPageImportanceSignals to embedder

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 245 matching lines @@
     WebAXObject accessibilityObject() override;
     void setSelectionColors(unsigned activeBackgroundColor,
                                     unsigned activeForegroundColor,
                                     unsigned inactiveBackgroundColor,
                                     unsigned inactiveForegroundColor) override;
     void performCustomContextMenuAction(unsigned action) override;
     void showContextMenu() override;
     void extractSmartClipData(WebRect, WebString&, WebString&, WebRect&) override;
     void hidePopups() override;
     void setPageOverlayColor(WebColor) override;
+    WebPageImportanceSignals* pageImportanceSignals() override;
     void transferActiveWheelFlingAnimation(const WebActiveWheelFlingParameters&) override;
     bool endActiveFlingAnimation() override;
     void setShowPaintRects(bool) override;
     void setShowDebugBorders(bool);
     void setShowFPSCounter(bool) override;
     void setShowScrollBottleneckRects(bool) override;
     void acceptLanguagesChanged() override;
 
     void setCompositedDisplayList(PassOwnPtr<CompositedDisplayList>);
     WebCompositedDisplayList* compositedDisplayList() override;
@@ skipping 245 matching lines @@
     void forceNextWebGLContextCreationToFail() override;
     void forceNextDrawingBufferCreationToFail() override;
 
     IntSize mainFrameSize();
     WebDisplayMode displayMode() const { return m_displayMode; }
 
     PageScaleConstraintsSet& pageScaleConstraintsSet() const;
 
     FloatSize elasticOverscroll() const { return m_elasticOverscroll; }
 
-    WebPageImportanceSignals& pageImportanceSignals() { return m_pageImportanceSignals; }
-
 private:
     InspectorOverlayImpl* inspectorOverlay();
 
     void setPageScaleFactorAndLocation(float, const FloatPoint&);
 
     void scrollAndRescaleViewports(float scaleFactor, const IntPoint& mainFrameOrigin, const FloatPoint& visualViewportOrigin);
 
     float maximumLegiblePageScale() const;
     void refreshPageScaleFactorAfterLayout();
     void resetScrollAndScaleState(bool immediately);
@@ skipping 225 matching lines @@
 };
 
 DEFINE_TYPE_CASTS(WebViewImpl, WebWidget, widget, widget->isWebView(), widget.isWebView());
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif