[WIP]Implement Chromium side changes for navigator.language(s) support for workers.

content/common/worker_messages.h

Index: content/common/worker_messages.h
diff --git a/content/common/worker_messages.h b/content/common/worker_messages.h
index 9f57b201fc60cbb4f1dff167adb7cff800950ae3..2ed186ffaf6bbec302de51450b486b8cbe87a1d0 100644
--- a/content/common/worker_messages.h
+++ b/content/common/worker_messages.h
@@ -44,6 +44,12 @@ IPC_STRUCT_BEGIN(WorkerProcessMsg_CreateWorker_Params)
   IPC_STRUCT_MEMBER(blink::WebContentSecurityPolicyType, security_policy_type)
   IPC_STRUCT_MEMBER(bool, pause_on_start)
   IPC_STRUCT_MEMBER(int, route_id)
+  IPC_STRUCT_MEMBER(base::string16, accept_languages)
+IPC_STRUCT_END()
+
+IPC_STRUCT_BEGIN(WorkerProcessMsg_LanguageChange_Params)
+  IPC_STRUCT_MEMBER(int, route_id)
+  IPC_STRUCT_MEMBER(base::string16, accept_languages)
 IPC_STRUCT_END()
 
 //-----------------------------------------------------------------------------
@@ -52,6 +58,13 @@ IPC_STRUCT_END()
 IPC_MESSAGE_CONTROL1(WorkerProcessMsg_CreateWorker,
                      WorkerProcessMsg_CreateWorker_Params)
 
+// Sent from the browser to renderer process(hosting the shared worker),
+// when the language is changed in settings
+// This should trigger languagechange event after setting the
+// changed accept languages in WorkerNavigator.
+IPC_MESSAGE_CONTROL1(WorkerProcessMsg_LanguageChange,
+                     WorkerProcessMsg_LanguageChange_Params)
+
 //-----------------------------------------------------------------------------
 // WorkerProcessHost messages
 // These are messages sent from the worker process to the browser process.