Remove LayoutBlockFlow overflow invalidation

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DisplayItemClient_h
 #define DisplayItemClient_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Assertions.h"
@@ skipping 45 matching lines @@
 // After the document cycle, a pointer/reference to DisplayItemClient should be
 // no longer dereferenced unless we can make sure the client is still valid.
 class PLATFORM_EXPORT DisplayItemClient {
 public:
 #if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
     DisplayItemClient();
     virtual ~DisplayItemClient();
 
     // Tests if this DisplayItemClient object has been created and has not been deleted yet.
     bool isAlive() const;
+
     // Called when any DisplayItem of this DisplayItemClient is added into PaintController
     // using PaintController::createAndAppend() or into a cached subsequence.
     void beginShouldKeepAlive(const void* owner) const;
+
+    // Called when the DisplayItemClient is sure that it can safely die before its owners
+    // have chance to remove it from the aliveness control.
+    void endShouldKeepAlive() const;
+
     // Clears all should-keep-alive DisplayItemClients of a PaintController. Called after
     // PaintController commits new display items or the subsequence owner is invalidated.
     static void endShouldKeepAliveAllClients(const void* owner);
     static void endShouldKeepAliveAllClients();
 
     // Called to clear should-keep-alive of DisplayItemClients in a subsequence if this
     // object is a subsequence.
 #define ON_DISPLAY_ITEM_CLIENT_INVALIDATION() endShouldKeepAliveAllClients(this)
 #else
     virtual ~DisplayItemClient() { }
@@ skipping 25 matching lines @@
     bool displayItemsAreCached(DisplayItemCacheGeneration) const final { return false; } \
     void setDisplayItemsCached(DisplayItemCacheGeneration) const final { } \
     void setDisplayItemsUncached() const final { }
 
 inline bool operator==(const DisplayItemClient& client1, const DisplayItemClient& client2) { return &client1 == &client2; }
 inline bool operator!=(const DisplayItemClient& client1, const DisplayItemClient& client2) { return &client1 != &client2; }
 
 } // namespace blink
 
 #endif // DisplayItemClient_h