Remove LayoutBlockFlow overflow invalidation

third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp b/third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp
index 1e196f2ef26e9c762da1f1a54f835f68e0748d55..a7da630bc3aa699ee5bf130cfcbb27652dec74ae 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/DisplayItemClient.cpp
@@ -58,6 +58,14 @@ void DisplayItemClient::beginShouldKeepAlive(const void* owner) const
         addResult.storedValue->value = debugName();
 }
 
+void DisplayItemClient::endShouldKeepAlive() const
+{
+    if (displayItemClientsShouldKeepAlive) {
+        for (auto item : *displayItemClientsShouldKeepAlive)
+            item.value.remove(this);
+    }
+}
+
 void DisplayItemClient::endShouldKeepAliveAllClients(const void* owner)
 {
     if (displayItemClientsShouldKeepAlive)