Convert main-thread overscroll parameters into viewport space.

third_party/WebKit/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 335 matching lines @@
     DCHECK(frame->document());
     Fullscreen::fullyExitFullscreen(*frame->document());
 
     WebViewImpl* newView = toWebViewImpl(
         m_webView->client()->createView(WebLocalFrameImpl::fromFrame(frame), WrappedResourceRequest(r.resourceRequest()), features, r.frameName(), policy, shouldSetOpener == NeverSetOpener));
     if (!newView)
         return nullptr;
     return newView->page();
 }
 
-void ChromeClientImpl::didOverscroll(const FloatSize& unusedDelta, const FloatSize& accumulatedRootOverScroll, const FloatPoint& position, const FloatSize& velocity)
+void ChromeClientImpl::didOverscroll(const FloatSize& overscrollDelta, const FloatSize& accumulatedOverscroll, const FloatPoint& positionInViewport, const FloatSize& velocityInViewport)
 {
     if (!m_webView->client())
         return;
 
-    m_webView->client()->didOverscroll(unusedDelta, accumulatedRootOverScroll, position, velocity);
+    m_webView->client()->didOverscroll(overscrollDelta, accumulatedOverscroll, positionInViewport, velocityInViewport);
 }
 
 void ChromeClientImpl::show(NavigationPolicy navigationPolicy)
 {
     if (m_webView->client())
         m_webView->client()->show(effectiveNavigationPolicy(navigationPolicy, m_windowFeatures));
 }
 
 void ChromeClientImpl::setToolbarsVisible(bool value)
 {
@@ skipping 717 matching lines @@
     if (m_webView->pageImportanceSignals())
         m_webView->pageImportanceSignals()->setIssuedNonGetFetchFromScript();
 }
 
 PassOwnPtr<WebFrameScheduler> ChromeClientImpl::createFrameScheduler(BlameContext* blameContext)
 {
     return adoptPtr(m_webView->scheduler()->createFrameScheduler(blameContext).release());
 }
 
 } // namespace blink