Improve merging of header modifications in webRequest.OnHeadersReceived

net/http/http_response_headers.h

Index: net/http/http_response_headers.h
diff --git a/net/http/http_response_headers.h b/net/http/http_response_headers.h
index 2cdc73e0855b806007e6e18a08eb98c563045147..c29964d61c54c3b4eafdef0311810908e511232f 100644
--- a/net/http/http_response_headers.h
+++ b/net/http/http_response_headers.h
@@ -63,6 +63,10 @@ class NET_EXPORT HttpResponseHeaders
   // Removes all instances of a particular header.
   void RemoveHeader(const std::string& name);
 
+  // Removes a particular header. The header name is compared
+  // case-insensitively.
+  void RemoveHeaderWithValue(const std::string& name, const std::string& value);
+
   // Adds a particular header.  |header| has to be a single header without any
   // EOL termination, just [<header-name>: <header-values>]
   // If a header with the same name is already stored, the two headers are not
@@ -300,6 +304,16 @@ class NET_EXPORT HttpResponseHeaders
   void MergeWithHeaders(const std::string& raw_headers,
                         const HeaderSet& headers_to_remove);
 
+  // Replaces the current headers with the merged version of |raw_headers| and
+  // the current headers with out the header consisting of
+  // |header_to_remove_name| and |header_to_remove_value|. Note that
+  // |header_to_remove_name| is compared case-insensitively.
+  // Note that the header to remove is removed from the current headers (before
+  // the merge), not after the merge.
+  void MergeWithHeadersWithValue(const std::string& raw_headers,
+                                 const std::string& header_to_remove_name,
+                                 const std::string& header_to_remove_value);
+
   // Adds the values from any 'cache-control: no-cache="foo,bar"' headers.
   void AddNonCacheableHeaders(HeaderSet* header_names) const;