Changes in DisplayItemClient for spv2 paint invalidation

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

 // 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.
 
 #include "platform/graphics/paint/DisplayItemClient.h"
 
 #if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #endif
 
 namespace blink {
 
-DisplayItemCacheGeneration::Generation DisplayItemCacheGeneration::s_nextGeneration = 1;
+DisplayItemCacheGeneration::Generation DisplayItemCacheGeneration::s_nextGeneration = kFirstValidGeneration;
 
 #if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
 
 HashSet<const DisplayItemClient*>* liveDisplayItemClients = nullptr;
 HashMap<const void*, HashMap<const DisplayItemClient*, String>>* displayItemClientsShouldKeepAlive = nullptr;
 
 DisplayItemClient::DisplayItemClient()
 {
     if (displayItemClientsShouldKeepAlive) {
         for (auto item : *displayItemClientsShouldKeepAlive)
@@ skipping 41 matching lines @@
 
 void DisplayItemClient::endShouldKeepAliveAllClients()
 {
     delete displayItemClientsShouldKeepAlive;
     displayItemClientsShouldKeepAlive = nullptr;
 }
 
 #endif // CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
 
 } // namespace blink