Add a DevTools command to create an isolated world for a given frame

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 44 matching lines @@
 #if DCHECK_IS_ON()
 static bool IsIsolatedWorldId(int world_id) {
   return DOMWrapperWorld::kMainWorldId < world_id &&
          world_id < DOMWrapperWorld::kIsolatedWorldIdLimit;
 }
 #endif
 
 PassRefPtr<DOMWrapperWorld> DOMWrapperWorld::Create(v8::Isolate* isolate,
                                                     WorldType world_type) {
   DCHECK_NE(WorldType::kIsolated, world_type);
-  return AdoptRef(new DOMWrapperWorld(isolate, world_type,
-                                      GenerateWorldIdForType(world_type)));
+  int world_id = GenerateWorldIdForType(world_type);
+  if (world_id == kInvalidWorldId)
+    return nullptr;
+  return AdoptRef(new DOMWrapperWorld(isolate, world_type, world_id));
 }
 
 DOMWrapperWorld::DOMWrapperWorld(v8::Isolate* isolate,
                                  WorldType world_type,
                                  int world_id)
     : world_type_(world_type),
       world_id_(world_id),
       dom_data_store_(
           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::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 159 matching lines @@
   DCHECK(dom_object_holders_.Contains(holder_base));
   dom_object_holders_.erase(holder_base);
 }
 
 void DOMWrapperWorld::WeakCallbackForDOMObjectHolder(
     const v8::WeakCallbackInfo<DOMObjectHolderBase>& data) {
   DOMObjectHolderBase* holder_base = data.GetParameter();
   holder_base->World()->UnregisterDOMObjectHolder(holder_base);
 }
 
+// static
 int DOMWrapperWorld::GenerateWorldIdForType(WorldType world_type) {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(ThreadSpecific<int>, next_world_id,
                                   new ThreadSpecific<int>);
   if (!next_world_id.IsSet())
     *next_world_id = WorldId::kUnspecifiedWorldIdStart;
   switch (world_type) {
     case WorldType::kMain:
       return kMainWorldId;
     case WorldType::kIsolated:
       // This function should not be called for IsolatedWorld because an
       // identifier for the world is given from out of DOMWrapperWorld.
       NOTREACHED();
       return kInvalidWorldId;
+    case WorldType::kInspectorIsolated: {
+      DCHECK(IsMainThread());
+      static int next_devtools_isolated_world_id =
+          WorldId::kDevToolsFirstIsolatedWorldId;
+      if (next_devtools_isolated_world_id >
+          WorldId::kDevToolsLastIsolatedWorldId)
+        return WorldId::kInvalidWorldId;
+      return next_devtools_isolated_world_id++;
+    }
     case WorldType::kGarbageCollector:
     case WorldType::kRegExp:
     case WorldType::kTesting:
     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