Improve handling of PaintInvalidationLayer (renamed to PaintInvalidationSubtree)

third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
index ba4acad492869c8797857c75bf02ce3f29c3ef6a..ea3906530a85200ea31bc7d5a15c53681ec72b1d 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
@@ -166,7 +166,7 @@ void LayoutBoxModelObject::styleWillChange(StyleDifference diff, const ComputedS
     FloatStateForStyleChange::setWasFloating(this, isFloating());
 
     if (const ComputedStyle* oldStyle = style()) {
-        if (parent() && diff.needsPaintInvalidationLayer()) {
+        if (parent() && diff.needsPaintInvalidationSubtree()) {
             if (oldStyle->hasAutoClip() != newStyle.hasAutoClip()
                 || oldStyle->clip() != newStyle.clip())
                 layer()->clipper().clearClipRectsIncludingDescendants();
@@ -398,17 +398,14 @@ void LayoutBoxModelObject::invalidateTreeIfNeeded(const PaintInvalidationState&
     PaintInvalidationReason reason = invalidatePaintIfNeeded(newPaintInvalidationState);
     clearPaintInvalidationFlags(newPaintInvalidationState);
 
-    if (reason == PaintInvalidationDelayedFull)
-        paintInvalidationState.pushDelayedPaintInvalidationTarget(*this);

[Xianzhu, 2016/05/05 23:56:33]

This is moved into PaintInvalidationState::updateForChildren().

-
     if (previousPosition != previousPositionFromPaintInvalidationBacking())
-        newPaintInvalidationState.setForceSubtreeInvalidationWithinContainer();
+        newPaintInvalidationState.setForceSubtreeInvalidationCheckingWithinContainer();
 
     // TODO(wangxianzhu): Combine this function into LayoutObject::invalidateTreeIfNeeded() when removing the following workarounds.
 
     // TODO(wangxianzhu): This is a workaround for crbug.com/533277. Will remove when we enable paint offset caching.
     if (reason != PaintInvalidationNone && hasPercentageTransform(styleRef()))
-        newPaintInvalidationState.setForceSubtreeInvalidationWithinContainer();
+        newPaintInvalidationState.setForceSubtreeInvalidationCheckingWithinContainer();
 
     // TODO(wangxianzhu): This is a workaround for crbug.com/490725. We don't have enough saved information to do accurate check
     // of clipping change. Will remove when we remove rect-based paint invalidation.
@@ -418,7 +415,7 @@ void LayoutBoxModelObject::invalidateTreeIfNeeded(const PaintInvalidationState&
         && hasOverflowClip())
         newPaintInvalidationState.setForceSubtreeInvalidationRectUpdateWithinContainer();
 
-    newPaintInvalidationState.updateForChildren();
+    newPaintInvalidationState.updateForChildren(reason);
     invalidatePaintOfSubtreesIfNeeded(newPaintInvalidationState);
 }