[Streams] Pass WebDataConsumerHandle when the response arrives.

public/platform/WebURLLoaderClient.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebURLLoaderClient_h
 #define WebURLLoaderClient_h
 
+#include "public/platform/WebDataConsumerHandle.h"
+
 namespace blink {
 
 class WebURLLoader;
 class WebURLRequest;
 class WebURLResponse;
 struct WebURLError;
 
 class WebURLLoaderClient {
 public:
     // Called when following a redirect. |newRequest| contains the request
     // generated by the redirect. The client may modify |newRequest|.
     virtual void willSendRequest(
         WebURLLoader*, WebURLRequest& newRequest, const WebURLResponse& redirectResponse) { }
 
     // Called to report upload progress. The bytes reported correspond to
     // the HTTP message body.
     virtual void didSendData(
         WebURLLoader*, unsigned long long bytesSent, unsigned long long totalBytesToBeSent) { }
 
     // Called when response headers are received.
     virtual void didReceiveResponse(WebURLLoader*, const WebURLResponse&) { }
 
+    // Called when response headers are received.
+    // The ownership of |handle| is transferred to the callee.
+    virtual void didReceiveResponse(WebURLLoader* loader, const WebURLResponse& response, WebDataConsumerHandle* handle)
+    {
+        delete handle;
+        didReceiveResponse(loader, response);
+    }
+
     // Called when a chunk of response data is downloaded. This is only called
     // if WebURLRequest's downloadToFile flag was set to true.
     virtual void didDownloadData(WebURLLoader*, int dataLength, int encodedDataLength) { }
 
     // Called when a chunk of response data is received.
     virtual void didReceiveData(WebURLLoader*, const char* data, int dataLength, int encodedDataLength) { }
 
     // Called when a chunk of renderer-generated metadata is received from the cache.
     virtual void didReceiveCachedMetadata(WebURLLoader*, const char* data, int dataLength) { }
 
     // Called when the load completes successfully.
     // |totalEncodedDataLength| may be equal to kUnknownEncodedDataLength.
     virtual void didFinishLoading(WebURLLoader* loader, double finishTime, int64_t totalEncodedDataLength) { }
 
     // Called when the load completes with an error.
     virtual void didFail(WebURLLoader*, const WebURLError&) { }
 
     // Value passed to didFinishLoading when total encoded data length isn't known.
     static const int64_t kUnknownEncodedDataLength = -1;
 
 protected:
     virtual ~WebURLLoaderClient() { }
 };
 
 } // namespace blink
 
 #endif