[WIP2] off-main-thread loading

third_party/WebKit/Source/platform/loader/fetch/Resource.h

Index: third_party/WebKit/Source/platform/loader/fetch/Resource.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/Resource.h b/third_party/WebKit/Source/platform/loader/fetch/Resource.h
index 0054b138e7b1deeeee0105eaa03f6bee4a0089ac..0293217e0aac6b7b4a17a3afa3e846f76f715f1b 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/Resource.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/Resource.h
@@ -48,6 +48,7 @@
 
 namespace blink {
 
+class FetchContext;
 class FetchParameters;
 class ResourceClient;
 class ResourceFetcher;
@@ -99,6 +100,14 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
     kReloadAlways,
   };
 
+  class ResourceCallback {
+   public:
+    virtual ~ResourceCallback() {}
+    virtual void Schedule(Resource*) = 0;
+    virtual void Cancel(Resource*) = 0;
+    virtual bool IsScheduled(Resource*) const = 0;
+  };
+
   virtual ~Resource();
 
   DECLARE_VIRTUAL_TRACE();
@@ -336,8 +345,13 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
       Type,
       const AtomicString& fetch_initiator_name);
 
+  void FinishPendingClients();
+
  protected:
-  Resource(const ResourceRequest&, Type, const ResourceLoaderOptions&);
+  Resource(const ResourceRequest&,
+           Type,
+           const ResourceLoaderOptions&,
+           FetchContext* = nullptr);
 
   virtual void CheckNotify();
 
@@ -352,8 +366,6 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
   void SetEncodedSize(size_t);
   void SetDecodedSize(size_t);
 
-  void FinishPendingClients();
-
   virtual void DidAddClient(ResourceClient*);
   void WillAddClientOrObserver(PreloadReferencePolicy);
 
@@ -408,7 +420,6 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
   };
 
  private:
-  class ResourceCallback;
   class CachedMetadataHandlerImpl;
   class ServiceWorkerResponseCachedMetadataHandler;
 
@@ -421,6 +432,8 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
 
   String ReasonNotDeletable() const;
 
+  ResourceCallback& GetResourceCallback();
+
   // MemoryCoordinatorClient overrides:
   void OnPurgeMemory() override;
 
@@ -475,6 +488,7 @@ class PLATFORM_EXPORT Resource : public GarbageCollectedFinalized<Resource>,
   double response_timestamp_;
 
   TaskRunnerTimer<Resource> cancel_timer_;
+  Member<FetchContext> fetch_context_;
 
   ResourceRequest resource_request_;
   Member<ResourceLoader> loader_;
@@ -489,7 +503,8 @@ class ResourceFactory {
  public:
   virtual Resource* Create(const ResourceRequest&,
                            const ResourceLoaderOptions&,
-                           const String&) const = 0;
+                           const String&,
+                           FetchContext*) const = 0;
   Resource::Type GetType() const { return type_; }
 
  protected: