Allow paint invalidation containers to cross frame boundaries. (re-land #2)

Source/core/rendering/PaintInvalidationState.cpp

Index: Source/core/rendering/PaintInvalidationState.cpp
diff --git a/Source/core/rendering/PaintInvalidationState.cpp b/Source/core/rendering/PaintInvalidationState.cpp
index 12753da0aa22a6da7771cd721d2f3fc49216b18f..933f9232b06e097d661b348a8ddee161542fd7b8 100644
--- a/Source/core/rendering/PaintInvalidationState.cpp
+++ b/Source/core/rendering/PaintInvalidationState.cpp
@@ -13,32 +13,25 @@
 
 namespace blink {
 
-PaintInvalidationState::PaintInvalidationState(RenderObject& renderer)
+PaintInvalidationState::PaintInvalidationState(const RenderView& renderView)
     : m_clipped(false)
     , m_cachedOffsetsEnabled(true)
     , m_forceCheckForPaintInvalidation(false)
-    , m_paintInvalidationContainer(*renderer.containerForPaintInvalidation())
-    , m_renderer(renderer)
+    , m_paintInvalidationContainer(*renderView.containerForPaintInvalidation())
+    , m_renderer(renderView)
 {
     bool establishesPaintInvalidationContainer = &m_renderer == &m_paintInvalidationContainer;
     if (!establishesPaintInvalidationContainer) {
-        if (!renderer.supportsPaintInvalidationStateCachedOffsets()) {
+        if (!renderView.supportsPaintInvalidationStateCachedOffsets()) {
             m_cachedOffsetsEnabled = false;
             return;
         }
-        bool invalidationContainerSkipped;
-        RenderObject* container = renderer.container(&m_paintInvalidationContainer, &invalidationContainerSkipped);
-        if (container && !invalidationContainerSkipped) {
-            FloatPoint point = container->localToContainerPoint(FloatPoint(), &m_paintInvalidationContainer);
-            if (container->isTableRow())
-                point = FloatPoint(point.x() - toRenderBox(container)->x().toFloat(), point.y() - toRenderBox(container)->y().toFloat());
-            m_paintOffset = LayoutSize(point.x(), point.y());
-
-            applyClipIfNeeded(*container);
-        }
-    } else {
-        applyClipIfNeeded(m_renderer);
+        FloatPoint point = renderView.localToContainerPoint(FloatPoint(), &m_paintInvalidationContainer, TraverseDocumentBoundaries);
+        m_paintOffset = LayoutSize(point.x(), point.y());
     }
+    m_clipRect = renderView.viewRect();
+    m_clipRect.move(m_paintOffset);
+    m_clipped = true;
 }
 
 PaintInvalidationState::PaintInvalidationState(const PaintInvalidationState& next, RenderLayerModelObject& renderer, const RenderLayerModelObject& paintInvalidationContainer)
@@ -64,6 +57,7 @@ PaintInvalidationState::PaintInvalidationState(const PaintInvalidationState& nex
             LayoutSize offset = m_renderer.isBox() && !m_renderer.isTableRow() ? toRenderBox(renderer).locationOffset() : LayoutSize();
             if (fixed) {
                 // FIXME: This doesn't work correctly with transforms.
+                // WRONG!
                 FloatPoint fixedOffset = m_renderer.view()->localToAbsolute(FloatPoint(), IsFixed);
                 m_paintOffset = LayoutSize(fixedOffset.x(), fixedOffset.y()) + offset;
             } else {