Update CPAT protocol to send lite-page transform acceptance with ect

components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
index 360914e06ad1d029edd651d4d3c2ff997dcaecc3..c58e7c604cf7e44a5bf7978458bc4bec018be7d0 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h
@@ -99,14 +99,9 @@ const char* identity_directive();
 const char* chrome_proxy_lite_page_directive();
 
 // Gets the Chrome-Proxy directive used by data reduction proxy lite page
-// preview experiment to ignore the blacklist.
-const char* chrome_proxy_lite_page_ignore_blacklist_directive();
-
-// Requests a transformation only if the server determines that the page is
-// otherwise heavy (i.e., the associated page load ordinarily requires the
-// network to transfer of a lot of bytes). Added to a previews directive. E.g.,
-// "lite-page;if-heavy".
-const char* if_heavy_qualifier();
+// preview experiment to force a lite page (in spite of current effective
+// connection type or page lightness).
+const char* chrome_proxy_force_lite_page_directive();
 
 // Returns true if the Chrome-Proxy-Content-Transform response header indicates
 // that an empty image has been provided.