[Streams] Pass WebDataConsumerHandle when the response arrives.

Source/core/page/EventSource.cpp

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011, Code Aurora Forum. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 202 matching lines @@
 const AtomicString& EventSource::interfaceName() const
 {
     return EventTargetNames::EventSource;
 }
 
 ExecutionContext* EventSource::executionContext() const
 {
     return ActiveDOMObject::executionContext();
 }
 
-void EventSource::didReceiveResponse(unsigned long, const ResourceResponse& response)
+void EventSource::didReceiveResponse(unsigned long, const ResourceResponse& response, PassOwnPtr<WebDataConsumerHandle> handle)
 {
+    ASSERT_UNUSED(handle, !handle);
     ASSERT(m_state == CONNECTING);
     ASSERT(m_requestInFlight);
 
     m_eventStreamOrigin = SecurityOrigin::create(response.url())->toString();
     int statusCode = response.httpStatusCode();
     bool mimeTypeIsValid = response.mimeType() == "text/event-stream";
     bool responseIsValid = statusCode == 200 && mimeTypeIsValid;
     if (responseIsValid) {
         const String& charset = response.textEncodingName();
         // If we have a charset, the only allowed value is UTF-8 (case-insensitive).
@@ skipping 196 matching lines @@
 
 PassRefPtrWillBeRawPtr<MessageEvent> EventSource::createMessageEvent()
 {
     RefPtrWillBeRawPtr<MessageEvent> event = MessageEvent::create();
     event->initMessageEvent(m_eventName.isEmpty() ? EventTypeNames::message : m_eventName, false, false, SerializedScriptValue::create(String(m_data)), m_eventStreamOrigin, m_lastEventId, 0, nullptr);
     m_data.clear();
     return event.release();
 }
 
 } // namespace blink