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

third_party/WebKit/Source/modules/fetch/FetchDataLoader.h

Index: third_party/WebKit/Source/modules/fetch/FetchDataLoader.h
diff --git a/third_party/WebKit/Source/modules/fetch/FetchDataLoader.h b/third_party/WebKit/Source/modules/fetch/FetchDataLoader.h
index 690b3aa8f210c49e58211798a80e7f1119469ce7..1dccffb0a78c648ce5c3d0d9aca538d340b955ed 100644
--- a/third_party/WebKit/Source/modules/fetch/FetchDataLoader.h
+++ b/third_party/WebKit/Source/modules/fetch/FetchDataLoader.h
@@ -8,6 +8,7 @@
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/streams/Stream.h"
 #include "modules/ModulesExport.h"
+#include "mojo/public/cpp/system/data_pipe.h"
 #include "platform/blob/BlobData.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
@@ -42,8 +43,8 @@ class MODULES_EXPORT FetchDataLoader
     }
     virtual void DidFetchDataLoadedString(const String&) { NOTREACHED(); }
     // This is called after all data are read from |handle| and written
-    // to |outStream|, and |outStream| is closed or aborted.
-    virtual void DidFetchDataLoadedStream() { NOTREACHED(); }
+    // to |out_datapipe|, and |out_datapipe| is closed or aborted.
+    virtual void DidFetchDataLoadedDataPipe() { NOTREACHED(); }
 
     // This function is called when a "custom" FetchDataLoader (none of the
     // ones listed above) finishes loading.
@@ -57,7 +58,9 @@ class MODULES_EXPORT FetchDataLoader
   static FetchDataLoader* CreateLoaderAsBlobHandle(const String& mime_type);
   static FetchDataLoader* CreateLoaderAsArrayBuffer();
   static FetchDataLoader* CreateLoaderAsString();
-  static FetchDataLoader* CreateLoaderAsStream(Stream*);
+  static FetchDataLoader* CreateLoaderAsDataPipe(
+      mojo::ScopedDataPipeProducerHandle out_datapipe);
+
   virtual ~FetchDataLoader() {}
 
   // |consumer| must not have a client when called.