Move WebDataSourceImpl from web/ -> core/exported/.

third_party/WebKit/public/web/WebDataSource.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 30 matching lines @@
 namespace blink {
 
 class WebDocumentSubresourceFilter;
 class WebServiceWorkerNetworkProvider;
 class WebURL;
 class WebURLRequest;
 class WebURLResponse;
 template <typename T>
 class WebVector;
 
-class WebDataSource {
+class BLINK_EXPORT 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
@@ skipping 75 matching lines @@
   virtual void SetSourceLocation(const WebSourceLocation&) = 0;
   virtual void ResetSourceLocation() = 0;
 
  protected:
   ~WebDataSource() {}
 };
 
 }  // namespace blink
 
 #endif