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diff --git a/Source/WebKit/chromium/public/WebDataSource.h b/Source/WebKit/chromium/public/WebDataSource.h
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+/*
+ * 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * 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 WebDataSource_h
+#define WebDataSource_h
+
+#include "WebCommon.h"
+#include "WebNavigationType.h"
+
+namespace WebKit {
+
+class WebApplicationCacheHost;
+class WebString;
+class WebURL;
+class WebURLRequest;
+class WebURLResponse;
+template <typename T> class WebVector;
+
+class WebDataSource {
+public:
+    class ExtraData {
+    public:
+        virtual ~ExtraData() { }
+    };
+
+    // Returns the original request that resulted in this datasource.
+    virtual const WebURLRequest& originalRequest() const = 0;
+
+    // Returns the request corresponding to this datasource.  It may
+    // include additional request headers added by WebKit that were not
+    // present in the original request.  This request may also correspond
+    // to a location specified by a redirect that was followed.
+    virtual const WebURLRequest& request() const = 0;
+
+    // Returns the response associated with this datasource.
+    virtual const WebURLResponse& response() const = 0;
+
+    // When this datasource was created as a result of WebFrame::loadData,
+    // there may be an associated unreachableURL.
+    virtual bool hasUnreachableURL() const = 0;
+    virtual WebURL unreachableURL() const = 0;
+
+    // Returns all redirects that occurred (both client and server) before
+    // at last committing the current page.  This will contain one entry
+    // for each intermediate URL, and one entry for the last URL (so if
+    // there are no redirects, it will contain exactly the current URL, and
+    // if there is one redirect, it will contain the source and destination
+    // URL).
+    virtual void redirectChain(WebVector<WebURL>&) const = 0;
+
+    // Returns the title for the current page.
+    virtual WebString pageTitle() const = 0;
+
+    // The type of navigation that triggered the creation of this datasource.
+    virtual WebNavigationType navigationType() const = 0;
+
+    // The time in seconds (since the epoch) of the event that triggered
+    // the creation of this datasource.  Returns 0 if unknown.
+    virtual double triggeringEventTime() const = 0;
+
+    // Extra data associated with this datasource.  If non-null, the extra
+    // data pointer will be deleted when the datasource is destroyed.
+    // Setting the extra data pointer will cause any existing non-null
+    // extra data pointer to be deleted.
+    virtual ExtraData* extraData() const = 0;
+    virtual void setExtraData(ExtraData*) = 0;
+
+    // The application cache host associated with this datasource.
+    virtual WebApplicationCacheHost* applicationCacheHost() = 0;
+
+    // Set deferMainResourceDataLoad flag on the loader.  This is used for
+    // testing.
+    virtual void setDeferMainResourceDataLoad(bool) = 0;
+
+protected:
+    ~WebDataSource() { }
+};
+
+} // namespace WebKit
+
+#endif