Add data reduction functionality to all platforms.

net/proxy/proxy_server.cc

Index: net/proxy/proxy_server.cc
diff --git a/net/proxy/proxy_server.cc b/net/proxy/proxy_server.cc
index b0997e0a0fa8ec31d0fbc06f55bebdc2f27ce035..1a8df767627abadde57ed1cc96518504cd02287c 100644
--- a/net/proxy/proxy_server.cc
+++ b/net/proxy/proxy_server.cc
@@ -220,7 +220,6 @@ ProxyServer::Scheme ProxyServer::GetSchemeFromURI(const std::string& scheme) {
 }
 
 // TODO(bengr): Use |scheme_| to indicate that this is the data reduction proxy.
-#if defined(SPDY_PROXY_AUTH_ORIGIN)
 bool ProxyServer::isDataReductionProxy() const {
     bool dev_host = false;
 #if defined (DATA_REDUCTION_DEV_HOST)
@@ -238,7 +237,6 @@ bool ProxyServer::isDataReductionProxyFallback() const {
 #endif  // defined(DATA_REDUCTION_FALLBACK_HOST)
   return false;
 }
-#endif  // defined(SPDY_PROXY_AUTH_ORIGIN)
 
 // static
 ProxyServer ProxyServer::FromSchemeHostAndPort(