[WIP] off-main-thread loading

content/renderer/renderer_blink_platform_impl.h

Index: content/renderer/renderer_blink_platform_impl.h
diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h
index 0a46d4ac5135a7a0c84a4c9953b9e96b47a2b696..435afede0da923bf4ace037c1ddc26cc3382893b 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -101,6 +101,8 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
       size_t,
       const blink::WebSecurityOrigin& cacheStorageOrigin,
       const blink::WebString& cacheStorageCacheName) override;
+  std::unique_ptr<blink::WebWorkerFetchContextInfo>
+  createWorkerFetchContextInfo() override;
   blink::WebString defaultLocale() override;
   void suddenTerminationChanged(bool enabled) override;
   blink::WebStorageNamespace* createLocalStorageNamespace() override;