Revert of Move dispatchDidFirstVisuallyNonEmptyLayout into WebViewImpl.

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 195 matching lines @@
     m_safeToPropagateScrollToParent = true;
     m_lastViewportSize = IntSize();
     m_lastZoomFactor = 1.0f;
     m_isTrackingPaintInvalidations = false;
     m_trackedPaintInvalidationRects.clear();
     m_lastPaintTime = 0;
     m_isPainting = false;
     m_visuallyNonEmptyCharacterCount = 0;
     m_visuallyNonEmptyPixelCount = 0;
     m_isVisuallyNonEmpty = false;
+    m_firstVisuallyNonEmptyLayoutCallbackPending = true;
     clearScrollAnchor();
     m_viewportConstrainedObjects.clear();
     m_layoutSubtreeRootList.clear();
 }
 
 void FrameView::removeFromAXObjectCache()
 {
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(this);
         cache->childrenChanged(m_frame->pagePopupOwner());
@@ skipping 833 matching lines @@
 
     m_nestedLayoutCount--;
     if (m_nestedLayoutCount)
         return;
 
 #if ENABLE(ASSERT)
     // Post-layout assert that nobody was re-marked as needing layout during layout.
     layoutView()->assertSubtreeIsLaidOut();
 #endif
 
-    // Ensure that we become visually non-empty eventually.
-    // TODO(esprehn): This should check isRenderingReady() instead.
-    if (!frame().document()->parsing() && frame().loader().stateMachine()->committedFirstRealDocumentLoad())
-        m_isVisuallyNonEmpty = true;
-
     // FIXME: It should be not possible to remove the FrameView from the frame/page during layout
     // however m_inPerformLayout is not set for most of this function, so none of our RELEASE_ASSERTS
     // in LocalFrame/Page will fire. One of the post-layout tasks is disconnecting the LocalFrame from
     // the page in fast/frames/crash-remove-iframe-during-object-beforeload-2.html
     // necessitating this check here.
     // ASSERT(frame()->page());
     if (frame().page())
         frame().page()->chromeClient().layoutUpdated(m_frame.get());
 
     frame().document()->layoutUpdated();
@@ skipping 883 matching lines @@
     ASSERT(!isInPerformLayout()); // Always before or after performLayout(), part of the highest-level layout() call.
     TRACE_EVENT0("blink,benchmark", "FrameView::performPostLayoutTasks");
     RefPtrWillBeRawPtr<FrameView> protect(this);
 
     m_postLayoutTasksTimer.stop();
 
     m_frame->selection().setCaretRectNeedsUpdate();
     m_frame->selection().updateAppearance();
 
     ASSERT(m_frame->document());
+    if (m_nestedLayoutCount <= 1) {
+        // Ensure that we always send this eventually.
+        if (!m_frame->document()->parsing() && m_frame->loader().stateMachine()->committedFirstRealDocumentLoad())
+            m_isVisuallyNonEmpty = true;
+
+        // If the layout was done with pending sheets, we are not in fact visually non-empty yet.
+        if (m_isVisuallyNonEmpty && !m_frame->document()->didLayoutWithPendingStylesheets() && m_firstVisuallyNonEmptyLayoutCallbackPending) {
+            m_firstVisuallyNonEmptyLayoutCallbackPending = false;
+            // FIXME: This callback is probably not needed, but is currently used
+            // by android for setting the background color.
+            m_frame->loader().client()->dispatchDidFirstVisuallyNonEmptyLayout();
+        }
+    }
 
     FontFaceSet::didLayout(*m_frame->document());
     // Cursor update scheduling is done by the local root, which is the main frame if there
     // are no RemoteFrame ancestors in the frame tree. Use of localFrameRoot() is
     // discouraged but will change when cursor update scheduling is moved from EventHandler
     // to PageEventHandler.
     frame().localFrameRoot()->eventHandler().scheduleCursorUpdate();
 
     updateWidgetPositions();
 
@@ skipping 1982 matching lines @@
 
     if (!graphicsLayer)
         return;
 
     DeprecatedPaintLayer::mapRectToPaintInvalidationBacking(localFrame->contentLayoutObject(), paintInvalidationContainer, viewRect);
 
     graphicsLayerTimingRequests.add(graphicsLayer, Vector<std::pair<int64_t, WebRect>>()).storedValue->value.append(std::make_pair(m_frame->frameID(), enclosingIntRect(viewRect)));
 }
 
 } // namespace blink