Fix caret paint invalidation issue on partial lifecycle updates

third_party/WebKit/Source/core/editing/CaretDisplayItemClient.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 51 matching lines @@
       m_visualRect = LayoutRect();
   }
 
   void layoutBlockWillBeDestroyed(const LayoutBlock& block) {
     if (!shouldPaintCaret(block))
       return;
     m_visualRect = LayoutRect();
     m_layoutBlock = nullptr;
   }
 
-  // Called when a FrameView finishes layout. Updates style and geometry of the
-  // caret for paint invalidation and painting.
-  void updateStyleAndLayoutIfNeeded(const PositionWithAffinity& caretPosition);
+  // Called before a FrameView starts paint invalidation. Updates style and
+  // geometry of the caret for paint invalidation and painting.
+  void updateForPaintInvalidation(const PositionWithAffinity& caretPosition);
 
   // Called during LayoutBlock paint invalidation.
   void invalidatePaintIfNeeded(
       const LayoutBlock&,
       const PaintInvalidatorContext&,
       PaintInvalidationReason layoutBlockPaintInvalidationReason);
 
   bool shouldPaintCaret(const LayoutBlock& block) const {
     return &block == m_layoutBlock;
   }
@@ skipping 32 matching lines @@
   // updateStyleAndLayoutIfNeeded() and can be used in invalidatePaintIfNeeded()
   // only.
   LayoutRect m_previousVisualRect;
 
   bool m_needsPaintInvalidation = false;
 };
 
 }  // namespace blink
 
 #endif  // CaretDisplayItemClient_h