[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 69 matching lines @@
           WTF::WrapUnique(new DOMDataStore(isolate, IsMainWorld()))) {
   switch (world_type_) {
     case WorldType::kMain:
       // The main world is managed separately from worldMap(). See worldMap().
       break;
     case WorldType::kIsolated:
     case WorldType::kInspectorIsolated:
     case WorldType::kGarbageCollector:
     case WorldType::kRegExp:
     case WorldType::kTesting:
+    case WorldType::kForV8ContextSnapshotNonMain:
     case WorldType::kWorker: {
       WorldMap& map = GetWorldMap();
       DCHECK(!map.Contains(world_id_));
       map.insert(world_id_, this);
       if (IsMainThread())
         number_of_non_main_worlds_in_main_thread_++;
       break;
     }
   }
 }
@@ skipping 181 matching lines @@
       static int next_devtools_isolated_world_id =
           IsolatedWorldId::kDevToolsFirstIsolatedWorldId;
       if (next_devtools_isolated_world_id >
           IsolatedWorldId::kDevToolsLastIsolatedWorldId)
         return WorldId::kInvalidWorldId;
       return next_devtools_isolated_world_id++;
     }
     case WorldType::kGarbageCollector:
     case WorldType::kRegExp:
     case WorldType::kTesting:
+    case WorldType::kForV8ContextSnapshotNonMain:
     case WorldType::kWorker:
       int world_id = *next_world_id;
       CHECK_GE(world_id, WorldId::kUnspecifiedWorldIdStart);
       *next_world_id = world_id + 1;
       return world_id;
   }
   NOTREACHED();
   return kInvalidWorldId;
 }
 
 void DOMWrapperWorld::DissociateDOMWindowWrappersInAllWorlds(
     ScriptWrappable* script_wrappable) {
   DCHECK(script_wrappable);
   DCHECK(IsMainThread());
 
   script_wrappable->UnsetWrapperIfAny();
 
   for (auto& world : GetWorldMap().Values())
     world->DomDataStore().UnsetWrapperIfAny(script_wrappable);
 }
 
 }  // namespace blink