Add autoresize capability for Chromium.

Source/WebCore/page/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 989 matching lines @@
     RenderObject* root = subtree ? m_layoutRoot : document->renderer();
     if (!root) {
         // FIXME: Do we need to set m_size here?
         m_layoutSchedulingEnabled = true;
         return;
     }
 
     FontCachePurgePreventer fontCachePurgePreventer;
 
     m_nestedLayoutCount++;
-
     if (!m_layoutRoot) {
         Document* document = m_frame->document();
         Node* body = document->body();
         if (body && body->renderer()) {
             if (body->hasTagName(framesetTag) && m_frame->settings() && !m_frame->settings()->frameFlatteningEnabled()) {
                 body->renderer()->setChildNeedsLayout(true);
             } else if (body->hasTagName(bodyTag)) {
                 if (!m_firstLayout && m_size.height() != layoutHeight() && body->renderer()->enclosingBox()->stretchesToViewport())
                     body->renderer()->setChildNeedsLayout(true);
             }
         }
         
 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
         if (m_firstLayout && !m_frame->ownerElement())
             printf("Elapsed time before first layout: %d\n", document->elapsedTime());
 #endif        
     }
 
+    Page* page = m_frame ? m_frame->page() : 0;
+    if (page)
+        page->chrome()->client()->layoutBeforeScrollbarUpdate(m_frame.get());
+
     ScrollbarMode hMode;
     ScrollbarMode vMode;    
     calculateScrollbarModesForLayout(hMode, vMode);
 
     m_doFullRepaint = !subtree && (m_firstLayout || toRenderView(root)->printing());
 
     if (!subtree) {
         // Now set our scrollbar state for the layout.
         ScrollbarMode currentHMode = horizontalScrollbarMode();
         ScrollbarMode currentVMode = verticalScrollbarMode();
@@ skipping 45 matching lines @@
         bool disableLayoutState = false;
         if (subtree) {
             RenderView* view = root->view();
             disableLayoutState = view->shouldDisableLayoutStateForSubtree(root);
             view->pushLayoutState(root);
         }
         LayoutStateDisabler layoutStateDisabler(disableLayoutState ? root->view() : 0);
 
         m_inLayout = true;
         beginDeferredRepaints();
-        root->layout();
+        // If an intermediate step has already done the layout, then skip it.
+        if (root->needsLayout())
+            root->layout();
         endDeferredRepaints();
         m_inLayout = false;
 
         if (subtree)
             root->view()->popLayoutState(root);
     }
     m_layoutRoot = 0;
-
-    m_layoutSchedulingEnabled = true;
+    if (m_nestedLayoutCount == 1)
+        m_layoutSchedulingEnabled = true;
 
     if (!subtree && !toRenderView(root)->printing())
         adjustViewSize();
 
     // Now update the positions of all layers.
     beginDeferredRepaints();
     bool hasLayerOffset;
     LayoutPoint offsetFromRoot = layer->computeOffsetFromRoot(hasLayerOffset);
     if (m_doFullRepaint)
         root->view()->repaint(); // FIXME: This isn't really right, since the RenderView doesn't fully encompass the visibleContentRect(). It just happens
@@ skipping 54 matching lines @@
     } else {
         m_actionScheduler->resume();
     }
 
     InspectorInstrumentation::didLayout(cookie);
 
     m_nestedLayoutCount--;
     if (m_nestedLayoutCount)
         return;
 
-    Page* page = frame() ? frame()->page() : 0;
+    page = m_frame ? m_frame->page() : 0;
     if (!page)
         return;
 
     page->chrome()->client()->layoutUpdated(frame());
     forceLayoutParentViewIfNeeded();
 }
 
 RenderBox* FrameView::embeddedContentBox() const
 {
 #if ENABLE(SVG)
@@ skipping 1956 matching lines @@
 }
     
 AXObjectCache* FrameView::axObjectCache() const
 {
     if (frame() && frame()->document() && frame()->document()->axObjectCacheExists())
         return frame()->document()->axObjectCache();
     return 0;
 }
     
 } // namespace WebCore