Make PPAPI test servers start in parallel

net/test/local_test_server.cc

Index: net/test/local_test_server.cc
diff --git a/net/test/local_test_server.cc b/net/test/local_test_server.cc
index 5e1e0e93765030d3ec3651465ec99e3cf0c20b71..7cb1a0ddcb3083d19466b05398e3f7883fc8b8a0 100644
--- a/net/test/local_test_server.cc
+++ b/net/test/local_test_server.cc
@@ -103,6 +103,10 @@ bool LocalTestServer::GetTestServerPath(FilePath* testserver_path) const {
 }
 
 bool LocalTestServer::Start() {
+  return StartInBackground() && BlockUntilStarted();
+}
+
+bool LocalTestServer::StartInBackground() {
   // Get path to Python server script.
   FilePath testserver_path;
   if (!GetTestServerPath(&testserver_path))
@@ -114,6 +118,10 @@ bool LocalTestServer::Start() {
   if (!LaunchPython(testserver_path))
     return false;
 
+  return true;
+}
+
+bool LocalTestServer::BlockUntilStarted() {
   if (!WaitToStart()) {
     Stop();
     return false;