Fix paint invalidation and painting for composited-scrolling input elements.

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

Index: third_party/WebKit/Source/core/editing/CaretBase.h
diff --git a/third_party/WebKit/Source/core/editing/CaretBase.h b/third_party/WebKit/Source/core/editing/CaretBase.h
index a69b67a91728c8b64ad8b3391916e82c68ca5a17..ba8b9ce2aebf0b980110140af20239a79bd4d868 100644
--- a/third_party/WebKit/Source/core/editing/CaretBase.h
+++ b/third_party/WebKit/Source/core/editing/CaretBase.h
@@ -35,6 +35,7 @@
 namespace blink {
 
 class CullRect;
+class DisplayItemClient;
 class LocalFrame;
 class GraphicsContext;
 class LayoutBlock;
@@ -72,6 +73,8 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
+    static DisplayItemClient* displayItemClientForCaret(Node*);
+
     LayoutRect m_caretLocalRect; // caret rect in coords local to the layoutObject responsible for painting the caret
     CaretVisibility m_caretVisibility;
 };