Propogate the UI language on the command line and expose to Flash.

content/ppapi_plugin/ppapi_thread.cc

Index: content/ppapi_plugin/ppapi_thread.cc
diff --git a/content/ppapi_plugin/ppapi_thread.cc b/content/ppapi_plugin/ppapi_thread.cc
index e5ae2106e417dd2060eb9c069f5f2d81391f3cdb..e1065718a18a57d82d8339c93b82515c57de2ca6 100644
--- a/content/ppapi_plugin/ppapi_thread.cc
+++ b/content/ppapi_plugin/ppapi_thread.cc
@@ -28,6 +28,7 @@
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/interface_list.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
+#include "ui/base/ui_base_switches.h"
 #include "webkit/plugins/plugin_switches.h"
 
 #if defined(OS_WIN)
@@ -161,6 +162,11 @@ bool PpapiThread::SendToBrowser(IPC::Message* msg) {
   return sync_message_filter()->Send(msg);
 }
 
+std::string PpapiThread::GetUILanguage() {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  return command_line->GetSwitchValueASCII(switches::kLang);
+}
+
 void PpapiThread::PreCacheFont(const void* logfontw) {
 #if defined(OS_WIN)
   Send(new ChildProcessHostMsg_PreCacheFont(