ServiceWorker: Use mojo's data pipe for respondWith(stream)

third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h

Index: third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
diff --git a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
index 4b8c565edbc49ab90c28183cf91ca6a8bc4c2700..2b0197f45284d52f588d163c907c0616e9719529 100644
--- a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
+++ b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
@@ -39,6 +39,7 @@
 #include "public/platform/modules/serviceworker/WebServiceWorkerClientsInfo.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerEventResult.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerSkipWaitingCallbacks.h"
+#include "public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h"
 #include "public/web/WebDevToolsAgentClient.h"
 #include "v8/include/v8.h"
 
@@ -170,9 +171,15 @@ class WebServiceWorkerContextClient {
   // dispatchFetchEvent respectively.

[falken, 2017/04/12 08:00:16]

RespondToFetchEvent and ResponseToFetchEventWithResponse are tricky names.

suggest....

// Used when respondWith() is not called. Tells the browser to fall back to
native fetch.
RespondToFetchEventWithNoResponse()
// Responds to the fetch event with |response|.
RespondToFetchEvent()
// Responds to the fetch event with |response|, where body is
|web_stream_handle|.
RespondToFetchEventWithStreamBody()

I think |body_as_stream| or |body| is easier to understand than
|web_stream_handle|.

[shimazu, 2017/04/18 01:50:05]

Done.

   virtual void RespondToFetchEvent(int fetch_event_id,
                                    double event_dispatch_time) {}
-  virtual void RespondToFetchEvent(int fetch_event_id,
-                                   const WebServiceWorkerResponse& response,
-                                   double event_dispatch_time) {}
+  virtual void RespondToFetchEventWithResponse(
+      int fetch_event_id,
+      const WebServiceWorkerResponse& response,
+      double event_dispatch_time) {}
+  virtual void RespondToFetchEventWithResponseStream(
+      int fetch_event_id,
+      const WebServiceWorkerResponse& response,
+      WebServiceWorkerStreamHandle* web_stream_handle,
+      double event_dispatch_time) {}
   virtual void RespondToPaymentRequestEvent(
       int event_id,
       const WebPaymentAppResponse& response,