Remove WebViewImpl helper methods for setting scroll offset.

Source/web/FullscreenController.cpp

 /*
  * Copyright (C) 2013 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 60 matching lines @@
     if (!m_fullScreenFrame)
         return;
 
     if (!m_exitFullscreenPageScaleFactor) {
         m_exitFullscreenPageScaleFactor = m_webViewImpl->pageScaleFactor();
         m_exitFullscreenScrollOffset = m_webViewImpl->mainFrame()->scrollOffset();
         m_exitFullscreenPinchViewportOffset = m_webViewImpl->pinchViewportOffset();
 
         updatePageScaleConstraints(false);
         m_webViewImpl->setPageScaleFactor(1.0f);
-        m_webViewImpl->setMainFrameScrollOffset(IntPoint());
+        m_webViewImpl->mainFrame()->setScrollOffset(WebSize());
         m_webViewImpl->setPinchViewportOffset(FloatPoint());
     }
 
     Fullscreen::from(document).didEnterFullScreenForElement(element.get());
     ASSERT(Fullscreen::currentFullScreenElementFrom(document) == element);
 
     if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled()) {
         if (isHTMLVideoElement(element)) {
             HTMLVideoElement* videoElement = toHTMLVideoElement(element);
             if (HTMLMediaElement::isMediaStreamURL(videoElement->sourceURL().string()))
@@ skipping 22 matching lines @@
                 m_isCancelingFullScreen = true;
                 Fullscreen::fullyExitFullscreen(*document);
                 m_isCancelingFullScreen = false;
 
                 if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled() && m_webViewImpl->layerTreeView())
                     m_webViewImpl->layerTreeView()->setHasTransparentBackground(m_webViewImpl->isTransparent());
 
                 if (m_exitFullscreenPageScaleFactor) {
                     updatePageScaleConstraints(true);
                     m_webViewImpl->setPageScaleFactor(m_exitFullscreenPageScaleFactor);
-                    m_webViewImpl->setMainFrameScrollOffset(IntPoint(m_exitFullscreenScrollOffset));
+                    m_webViewImpl->mainFrame()->setScrollOffset(WebSize(m_exitFullscreenScrollOffset));
                     m_webViewImpl->setPinchViewportOffset(m_exitFullscreenPinchViewportOffset);
                     m_exitFullscreenPageScaleFactor = 0;
                     m_exitFullscreenScrollOffset = IntSize();
                 }
 
                 fullscreen->didExitFullScreenForElement(0);
             }
         }
     }
 
@@ skipping 61 matching lines @@
 }
 
 DEFINE_TRACE(FullscreenController)
 {
     visitor->trace(m_provisionalFullScreenElement);
     visitor->trace(m_fullScreenFrame);
 }
 
 } // namespace blink