[Streams] Pass WebDataConsumerHandle when the response arrives.

Source/core/fetch/RawResource.cpp

 /*
  * Copyright (C) 2011 Google Inc. 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 47 matching lines @@
     ResourcePtr<RawResource> protect(this);
     RawResourceClient* client = static_cast<RawResourceClient*>(c);
     for (const auto& redirect : redirectChain()) {
         ResourceRequest request(redirect.m_request);
         client->redirectReceived(this, request, redirect.m_redirectResponse);
         if (!hasClient(c))
             return;
     }
 
     if (!m_response.isNull())
-        client->responseReceived(this, m_response);
+        client->responseReceived(this, m_response, nullptr);
     if (!hasClient(c))
         return;
     if (m_data)
         client->dataReceived(this, m_data->data(), m_data->size());
     if (!hasClient(c))
         return;
     Resource::didAddClient(client);
 }
 
 void RawResource::willFollowRedirect(ResourceRequest& newRequest, const ResourceResponse& redirectResponse)
 {
     ResourcePtr<RawResource> protect(this);
     if (!redirectResponse.isNull()) {
         ResourceClientWalker<RawResourceClient> w(m_clients);
         while (RawResourceClient* c = w.next())
             c->redirectReceived(this, newRequest, redirectResponse);
     }
     Resource::willFollowRedirect(newRequest, redirectResponse);
 }
 
 void RawResource::updateRequest(const ResourceRequest& request)
 {
     ResourcePtr<RawResource> protect(this);
     ResourceClientWalker<RawResourceClient> w(m_clients);
     while (RawResourceClient* c = w.next())
         c->updateRequest(this, request);
 }
 
-void RawResource::responseReceived(const ResourceResponse& response)
+void RawResource::responseReceived(const ResourceResponse& response, PassOwnPtr<WebDataConsumerHandle> handle)
 {
     InternalResourcePtr protect(this);
-    Resource::responseReceived(response);
+    Resource::responseReceived(response, nullptr);
     ResourceClientWalker<RawResourceClient> w(m_clients);
-    while (RawResourceClient* c = w.next())
-        c->responseReceived(this, m_response);
+    ASSERT(count() <= 1 || !handle);
+    while (RawResourceClient* c = w.next()) {
+        // |handle| is cleared when passed, but it's not a problem because
+        // |handle| is null when there are two or more clients, as asserted.
+        c->responseReceived(this, m_response, handle);
+    }
 }
 
 void RawResource::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
 {
     ResourceClientWalker<RawResourceClient> w(m_clients);
     while (RawResourceClient* c = w.next())
         c->dataSent(this, bytesSent, totalBytesToBeSent);
 }
 
 void RawResource::didDownloadData(int dataLength)
@@ skipping 65 matching lines @@
     for (const auto& header : oldHeaders) {
         AtomicString headerName = header.key;
         if (!shouldIgnoreHeaderForCacheReuse(headerName) && header.value != newHeaders.get(headerName))
             return false;
     }
 
     return true;
 }
 
 } // namespace blink