Set the user agent for 0.6

blimp/client/core/settings/user_agent.cc

Index: blimp/client/core/settings/user_agent.cc
diff --git a/blimp/client/app/user_agent.cc b/blimp/client/core/settings/user_agent.cc
similarity index 95%
rename from blimp/client/app/user_agent.cc
rename to blimp/client/core/settings/user_agent.cc
index 84c223c4b65f1afec5f9498fec3f6a253c0a9df1..47d0167dbb802bb70deb0f864925b27cd0f8c9d3 100644
--- a/blimp/client/app/user_agent.cc
+++ b/blimp/client/core/settings/user_agent.cc
@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "blimp/client/app/user_agent.h"
+#include "blimp/client/core/settings/user_agent.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 
+#if defined(OS_POSIX) && !defined(OS_ANDROID)
+#include <sys/utsname.h>
+#endif
+
 namespace blimp {
 
 /**