PPAPI/WS: use server providing hostname as test serevr hostname

ppapi/tests/test_websocket.cc

Index: ppapi/tests/test_websocket.cc
diff --git a/ppapi/tests/test_websocket.cc b/ppapi/tests/test_websocket.cc
index acbad3e4de0280d3a80a73086198292a32afeeae..5b400eeb38f6707775b917399d23b2690275a0b8 100644
--- a/ppapi/tests/test_websocket.cc
+++ b/ppapi/tests/test_websocket.cc
@@ -240,8 +240,13 @@ void TestWebSocket::RunTests(const std::string& filter) {
 }
 
 std::string TestWebSocket::GetFullURL(const char* url) {
-  std::string rv = "ws://localhost";
-  // Some WebSocket tests don't start the server so there'll be no port.
+  std::string rv = "ws://";
+  // Some WebSocket tests don't start the server so there'll be no host and
+  // port.
+  if (instance_->websocket_host().empty())
+    rv += "127.0.0.1";
+  else
+    rv += instance_->websocket_host();
   if (instance_->websocket_port() != -1) {
     char buffer[10];
     sprintf(buffer, ":%d", instance_->websocket_port());