Implement the infrastructure of creating WorkerFetchContext in worker global scope.

third_party/WebKit/public/web/WebSharedWorkerClient.h

Index: third_party/WebKit/public/web/WebSharedWorkerClient.h
diff --git a/third_party/WebKit/public/web/WebSharedWorkerClient.h b/third_party/WebKit/public/web/WebSharedWorkerClient.h
index 46f8cf1d1aa872e73235f5f04264b46c42685a57..3b49991d9de2340fec1fd16958497bab8b690922 100644
--- a/third_party/WebKit/public/web/WebSharedWorkerClient.h
+++ b/third_party/WebKit/public/web/WebSharedWorkerClient.h
@@ -43,6 +43,7 @@ class WebSecurityOrigin;
 class WebServiceWorkerNetworkProvider;
 class WebString;
 class WebWorkerContentSettingsClientProxy;
+class WebWorkerFetchContext;
 
 // Provides an interface back to the in-page script object for a worker.
 // All functions are expected to be called back on the thread that created
@@ -93,6 +94,11 @@ class WebSharedWorkerClient {
   CreateDevToolsMessageLoop() {
     return nullptr;
   }
+
+  // Returns a new WebWorkerFetchContext for the shared worker. Ownership of the
+  // returned object is transferred to the caller. This is used only when
+  // off-main-thread-fetch is enabled.
+  virtual WebWorkerFetchContext* CreateWorkerFetchContext() { return nullptr; }

[kinuko, 2017/04/20 04:08:14]

ditto (unique_ptr)

[nhiroki, 2017/04/20 04:16:07]

How about returning std::unique_ptr<WebWorkerFetchContext>?

[horo, 2017/04/20 08:35:43]

Done.

 };
 
 }  // namespace blink