Don't cache subsequence whose layer is not fully contained by repaint rect

Source/platform/graphics/paint/SubsequenceRecorder.h

Index: Source/platform/graphics/paint/SubsequenceRecorder.h
diff --git a/Source/platform/graphics/paint/SubsequenceRecorder.h b/Source/platform/graphics/paint/SubsequenceRecorder.h
index ab699b373523cd2118d2e8f4c6814d55f1f06216..2cc13306d26db6d51c2f8de38cf20b62d45748fd 100644
--- a/Source/platform/graphics/paint/SubsequenceRecorder.h
+++ b/Source/platform/graphics/paint/SubsequenceRecorder.h
@@ -27,9 +27,12 @@ public:
     SubsequenceRecorder(GraphicsContext&, const DisplayItemClientWrapper&);
     ~SubsequenceRecorder();
 
+    void setUncacheable();
+
 private:
     DisplayItemList* m_displayItemList;
     DisplayItemClientWrapper m_client;
+    size_t m_beginSubsequenceIndex;
 };
 
 } // namespace blink