Move navigations with POST or referrer to the shell.

mojo/shell/fetcher.h

 // Copyright 2015 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 MOJO_SHELL_FETCHER_H_
 #define MOJO_SHELL_FETCHER_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 
@@ skipping 29 matching lines @@
   Fetcher(const FetchCallback& fetch_callback);
   virtual ~Fetcher();
 
   // Returns the original URL that was fetched.
   virtual const GURL& GetURL() const = 0;
 
   // If the fetch resulted in a redirect, this returns the final URL after all
   // redirects. Otherwise, it returns an empty URL.
   virtual GURL GetRedirectURL() const = 0;
 
+  // If the fetch resulted in a redirect, this returns the referer URL to use
+  // with the redirect.
+  virtual GURL GetRedirectReferer() const = 0;
+
   virtual URLResponsePtr AsURLResponse(base::TaskRunner* task_runner,
                                        uint32_t skip) = 0;
 
   virtual void AsPath(
       base::TaskRunner* task_runner,
       base::Callback<void(const base::FilePath&, bool)> callback) = 0;
 
   virtual std::string MimeType() = 0;
 
   virtual bool HasMojoMagic() = 0;
 
   virtual bool PeekFirstLine(std::string* line) = 0;
 
   bool PeekContentHandler(std::string* mojo_shebang,
                           GURL* mojo_content_handler_url);
 
  protected:
   static const char kMojoMagic[];
   static const size_t kMaxShebangLength;
 
   FetchCallback loader_callback_;
 };
 
 }  // namespace shell
 }  // namespace mojo
 
 #endif  // MOJO_SHELL_FETCHER_H_