Http cache: Always preserve extra headers when dealing with...

net/http/partial_data.h

Index: net/http/partial_data.h
===================================================================
--- net/http/partial_data.h	(revision 30754)
+++ net/http/partial_data.h	(working copy)
@@ -38,11 +38,14 @@
 
   // Performs initialization of the object by parsing the request |headers|
   // and verifying that we can process the requested range. Returns true if
-  // we can process the requested range, and false otherwise. |new_headers| is
-  // a subset of the request extra headers, with byte-range related headers
-  // removed so that we can easily add any byte-range that we need.
-  bool Init(const std::string& headers, const std::string& new_headers);
+  // we can process the requested range, and false otherwise.
+  bool Init(const std::string& headers);
 
+  // Sets the headers that we should use to make byte range requests. This is a
+  // subset of the request extra headers, with byte-range related headers
+  // removed.
+  void SetHeaders(const std::string& headers);
+
   // Restores the byte-range header that was removed during Init(), by appending
   // the data to the provided |headers|.
   void RestoreHeaders(std::string* headers) const;