Invalidate the previous caret even if the parent text node is removed.

third_party/WebKit/Source/core/editing/FrameSelection.cpp

Index: third_party/WebKit/Source/core/editing/FrameSelection.cpp
diff --git a/third_party/WebKit/Source/core/editing/FrameSelection.cpp b/third_party/WebKit/Source/core/editing/FrameSelection.cpp
index fd90957a58fd8df90dcd66039ffb75dd0e540789..384fee5bcaf652058ababbf4a7ddb3815f29e38b 100644
--- a/third_party/WebKit/Source/core/editing/FrameSelection.cpp
+++ b/third_party/WebKit/Source/core/editing/FrameSelection.cpp
@@ -405,6 +405,15 @@ void FrameSelection::nodeWillBeRemoved(Node& node)
 
     respondToNodeModification(node, removingNodeRemovesPosition(node, selection().base()), removingNodeRemovesPosition(node, selection().extent()),
         removingNodeRemovesPosition(node, selection().start()), removingNodeRemovesPosition(node, selection().end()));
+
+    if (m_previousCaretNode && node.isSameNode(m_previousCaretNode.get())) {

[yosin_UTC9, 2016/02/24 03:55:25]

|node == m_previousCaretNode|

Node::isSmaeNode() exists for backward compatibility.
https://developer.mozilla.org/en/docs/Web/API/Node/isSameNode

[dshwang, 2016/02/24 13:12:18]

Done.

+        // Hits in ManualTests/caret-paint-after-last-text-is-removed.html
+        DisableCompositingQueryAsserts disabler;
+        invalidateLocalCaretRect(m_previousCaretNode.get(), m_previousCaretRect);
+        m_previousCaretNode = nullptr;
+        m_previousCaretRect = LayoutRect();
+        m_previousCaretVisibility = Hidden;
+    }
 }
 
 static bool intersectsNode(const VisibleSelection& selection, Node* node)