[ES6 modules] ModuleMap::GetFetchedModuleScript to return nullptr when entry not found / "fetching"

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

Index: third_party/WebKit/Source/core/dom/ModuleMap.h
diff --git a/third_party/WebKit/Source/core/dom/ModuleMap.h b/third_party/WebKit/Source/core/dom/ModuleMap.h
index dcf51d17c8d02732e3add1c941c033da713bd27e..a7e10bef7431e4b25aa9be955157be37af18c7a4 100644
--- a/third_party/WebKit/Source/core/dom/ModuleMap.h
+++ b/third_party/WebKit/Source/core/dom/ModuleMap.h
@@ -41,8 +41,8 @@ class CORE_EXPORT ModuleMap final : public GarbageCollected<ModuleMap>,
                                SingleModuleClient*);
 
   // Synchronously get the ModuleScript for a given URL.
-  // Note: fetchSingleModuleScript of the ModuleScript must be complete before
-  // calling this.
+  // If the URL wasn't fetched, or is currently being fetched, this returns a
+  // nullptr.
   ModuleScript* GetFetchedModuleScript(const KURL&) const;
 
   Modulator* GetModulator() { return modulator_; }