Fix WebSocketServer extension parser.

net/websockets/websocket_deflate_parameters.h

Index: net/websockets/websocket_deflate_parameters.h
diff --git a/net/websockets/websocket_deflate_parameters.h b/net/websockets/websocket_deflate_parameters.h
index 11f896741ab1fa51650f97d3efd69e4ef30a8f24..92e616cd98592c7176597cf050329342dd6999ea 100644
--- a/net/websockets/websocket_deflate_parameters.h
+++ b/net/websockets/websocket_deflate_parameters.h
@@ -93,6 +93,13 @@ class NET_EXPORT_PRIVATE WebSocketDeflateParameters {
     client_max_window_bits_ = WindowBits(bits, true, true);
   }
 
+  int PermissiveServerMaxWindowBits() const {
+    return server_max_window_bits_.PermissiveBits();
+  }
+  int PermissiveClientMaxWindowBits() const {
+    return client_max_window_bits_.PermissiveBits();
+  }
+
   // Return true if |bits| is valid as a max_window_bits value.
   static bool IsValidWindowBits(int bits) { return 8 <= bits && bits <= 15; }
 
@@ -102,6 +109,8 @@ class NET_EXPORT_PRIVATE WebSocketDeflateParameters {
     WindowBits(int16 bits, bool is_specified, bool has_value)
         : bits(bits), is_specified(is_specified), has_value(has_value) {}
 
+    int PermissiveBits() const { return is_specified && has_value ? bits : 15; }
+
     int16 bits;
     // True when "window bits" parameter appears in the parameters.
     bool is_specified;