[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index dedff943c98acf93cda3678cece0d3ac70e6a1ae..95c98cd15762a3a05b83c9191393b046e977add9 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -135,6 +135,7 @@ class LocalFrame;
 class Location;
 class MediaQueryListListener;
 class MediaQueryMatcher;
+class ModuleMap;
 class NodeFilter;
 class NodeIterator;
 class NthIndexCache;
@@ -1298,6 +1299,8 @@ class CORE_EXPORT Document : public ContainerNode,
 
   PropertyRegistry* propertyRegistry();
 
+  ModuleMap* ensureModuleMap();
+
   // Indicates whether the user has interacted with this particular Document.
   void setHasReceivedUserGesture() { m_hasReceivedUserGesture = true; }
   bool hasReceivedUserGesture() const { return m_hasReceivedUserGesture; }
@@ -1667,6 +1670,8 @@ class CORE_EXPORT Document : public ContainerNode,
 
   Member<PropertyRegistry> m_propertyRegistry;
 
+  Member<ModuleMap> m_moduleMap;

[dominicc (has gone to gerrit), 2016/12/13 07:45:29]

I think we need to reset this on detach or we might leak? Presumably modules
hold onto their exports. This would let me set up a document -> module -> export
-> document cycle.

[kouhei (in TOK), 2016/12/15 04:56:26]

I'm not sure if explicit reset is still needed in Oilpan+TraceWrapper world.
Also, the proper place for m_moduleMap is probably LocalDOMWindow?

+
   unsigned m_passwordCount;
 
   TaskHandle m_sensitiveInputVisibilityTask;