Override DRP proxies from command line switches

components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
index 028f84f84e2eaa24b5249b2fb239e61f66b68f0b..5f2e8d405a9a8f45897fb39f04426a3b27599c55 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_switches.cc
@@ -29,12 +29,12 @@ const char kDataReductionProxyExperiment[] = "data-reduction-proxy-experiment";
 const char kDataReductionProxyFallback[] = "spdy-proxy-auth-fallback";
 
 // The semicolon-separated list of proxy server URIs to override the list of
-// HTTP proxies returned by the Data Saver API. If set, the value of this flag
-// overrides any proxies specified by other flags like --spdy-proxy-auth-origin
-// or --spdy-proxy-auth-fallback. If the URI omits a scheme, then the proxy
-// server scheme defaults to HTTP, and if the port is omitted then the default
-// port for that scheme is used. E.g. "http://foo.net:80", "http://foo.net",
-// "foo.net:80", and "foo.net" are all equivalent.
+// HTTP proxies returned by the Data Saver API. It is illegal to use
+// |kDataReductionProxy| or |kDataReductionProxyFallback| switch in conjunction
+// with |kDataReductionProxyHttpProxies|. If the URI omits a scheme, then the
+// proxy server scheme defaults to HTTP, and if the port is omitted then the
+// default port for that scheme is used. E.g. "http://foo.net:80",
+// "http://foo.net", "foo.net:80", and "foo.net" are all equivalent.
 const char kDataReductionProxyHttpProxies[] =
     "data-reduction-proxy-http-proxies";