Made Blink aware of top controls offset (Blink-side)

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 394 matching lines @@
     , m_fullscreenController(FullscreenController::create(this))
     , m_showFPSCounter(false)
     , m_showPaintRects(false)
     , m_showDebugBorders(false)
     , m_continuousPaintingEnabled(false)
     , m_showScrollBottleneckRects(false)
     , m_baseBackgroundColor(Color::white)
     , m_backgroundColorOverride(Color::transparent)
     , m_zoomFactorOverride(0)
     , m_userGestureObserved(false)
+    , m_topControlsContentOffset(0)
 {
     Page::PageClients pageClients;
     pageClients.chromeClient = &m_chromeClientImpl;
     pageClients.contextMenuClient = &m_contextMenuClientImpl;
     pageClients.editorClient = &m_editorClientImpl;
     pageClients.dragClient = &m_dragClientImpl;
     pageClients.inspectorClient = &m_inspectorClientImpl;
     pageClients.backForwardClient = &m_backForwardClientImpl;
     pageClients.spellCheckerClient = &m_spellCheckerClientImpl;
     pageClients.storageClient = &m_storageClientImpl;
@@ skipping 1229 matching lines @@
     // usually set equal to the view size. These values are not considered viewport-dependent
     // (see MediaQueryExp::isViewportDependent), since they are only viewport-dependent in emulation mode,
     // and thus will not be invalidated in |FrameView::performPreLayoutTasks|.
     // Therefore we should force explicit media queries invalidation here.
     if (page()->inspectorController().deviceEmulationEnabled()) {
         if (Document* document = localFrameRootTemporary()->frame()->document())
             document->mediaQueryAffectingValueChanged();
     }
 }
 
+void WebViewImpl::setTopControlsContentOffset(float offset)
+{
+    m_topControlsContentOffset = offset;
+    m_layerTreeView->setTopControlsContentOffset(offset);
+}
+
 void WebViewImpl::resize(const WebSize& newSize)
 {
     if (m_shouldAutoResize || m_size == newSize)
         return;
 
     FrameView* view = localFrameRootTemporary()->frameView();
     if (!view)
         return;
 
     bool shouldAnchorAndRescaleViewport = settings()->mainFrameResizesAreOrientationChanges()
@@ skipping 2419 matching lines @@
 
     if (frameView->scrollPosition() == scrollPosition)
         return;
 
     bool oldProgrammaticScroll = frameView->inProgrammaticScroll();
     frameView->setInProgrammaticScroll(programmaticScroll);
     frameView->notifyScrollPositionChanged(scrollPosition);
     frameView->setInProgrammaticScroll(oldProgrammaticScroll);
 }
 
-void WebViewImpl::applyScrollAndScale(const WebSize& scrollDelta, float pageScaleDelta)
+void WebViewImpl::applyViewportDeltas(const WebSize& scrollDelta, float pageScaleDelta, float topControlsDelta)
 {
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return;
 
+    setTopControlsContentOffset(m_topControlsContentOffset + topControlsDelta);
+
     if (pinchVirtualViewportEnabled()) {
         if (pageScaleDelta != 1) {
             // When the virtual viewport is enabled, offsets are already set for us.
             setPageScaleFactor(pageScaleFactor() * pageScaleDelta);
             m_doubleTapZoomPending = false;
         }
 
         return;
     }
 
@@ skipping 160 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink