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diff --git a/webkit/media/test_response_generator.h b/webkit/media/test_response_generator.h
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+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_MEDIA_TEST_RESPONSE_GENERATOR_H_
+#define WEBKIT_MEDIA_TEST_RESPONSE_GENERATOR_H_
+
+#include "base/basictypes.h"
+#include "googleurl/src/gurl.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebURLError.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebURLResponse.h"
+
+namespace webkit_media {
+
+// Generates WebURLErrors and WebURLResponses suitable for testing purposes.
+class TestResponseGenerator {
+ public:
+  enum Flags {
+    kNormal = 0,
+    kNoAcceptRanges = 1 << 0,   // Don't include Accept-Ranges in 206 response.
+    kNoContentRange = 1 << 1,   // Don't include Content-Range in 206 response.
+    kNoContentLength = 1 << 2,  // Don't include Content-Length in 206 response.
+  };
+
+  // Build an HTTP response generator for the given URL. |content_length| is
+  // used to generate Content-Length and Content-Range headers.
+  TestResponseGenerator(const GURL& gurl, int64 content_length);
+
+  // Generates a WebURLError object.
+  WebKit::WebURLError GenerateError();
+
+  // Generates a regular HTTP 200 response.
+  WebKit::WebURLResponse Generate200();
+
+  // Generates a regular HTTP 206 response starting from |first_byte_offset|
+  // until the end of the resource.
+  WebKit::WebURLResponse Generate206(int64 first_byte_offset);
+
+  // Generates a custom HTTP 206 response starting from |first_byte_offset|
+  // until the end of the resource. You can tweak what gets included in the
+  // headers via |flags|.
+  WebKit::WebURLResponse Generate206(int64 first_byte_offset, Flags flags);
+
+  // Generates a regular HTTP 404 response.
+  WebKit::WebURLResponse Generate404();
+
+  const GURL& gurl() { return gurl_; }
+  int64 content_length() { return content_length_; }
+
+ private:
+  GURL gurl_;
+  int64 content_length_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestResponseGenerator);
+};
+
+}  // namespace webkit_media
+
+#endif  // WEBKIT_MEDIA_TEST_RESPONSE_GENERATOR_H_