Traverse into child LayoutViews during invalidateTreeIfNeeded

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index e357928df8be93048699acc68f952d8da0905bdf..aaf17f703de48268efe10fd2dcc50243f5e60f64 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -63,6 +63,7 @@ class LayoutEmbeddedObject;
 class LayoutObject;
 class LayoutScrollbarPart;
 class LayoutView;
+class PaintInvalidationState;
 class Page;
 class ScrollingCoordinator;
 class TracedValue;
@@ -555,6 +556,8 @@ public:
     // Returns true if the document's writing mode is right-to-left or bottom-to-top.
     bool isFlippedDocument() const;
 
+    void invalidateTreeIfNeeded(PaintInvalidationState&);

[chrishtr, 2015/06/29 23:32:22]

Add a note that you shouldn't add a new top-level caller to this that is not for
the root frame of a frame tree.

[Xianzhu, 2015/06/30 00:02:12]

In the new patch set I keep it private, and add 'friend class LayoutPart'.

+
 protected:
     // Scroll the content via the compositor.
     bool scrollContentsFastPath(const IntSize& scrollDelta);
@@ -630,8 +633,6 @@ private:
     void scheduleOrPerformPostLayoutTasks();
     void performPostLayoutTasks();
 
-    void invalidateTreeIfNeeded(Vector<LayoutObject*>& pendingDelayedPaintInvalidations);
-
     DocumentLifecycle& lifecycle() const;
 
     void contentRectangleForPaintInvalidation(const IntRect&);