Blimp Settings framework on the c++ side

blimp/client/app/linux/blimp_client_context_delegate_linux.h

Index: blimp/client/app/linux/blimp_client_context_delegate_linux.h
diff --git a/blimp/client/app/linux/blimp_client_context_delegate_linux.h b/blimp/client/app/linux/blimp_client_context_delegate_linux.h
index d781e86752eb6cd2ab64dba8cd0d1ab8db62eab7..1dadd91db6c23464dad957c2994fe656e9b61f11 100644
--- a/blimp/client/app/linux/blimp_client_context_delegate_linux.h
+++ b/blimp/client/app/linux/blimp_client_context_delegate_linux.h
@@ -8,6 +8,11 @@
 #include "blimp/client/public/blimp_client_context_delegate.h"
 #include "google_apis/gaia/identity_provider.h"
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+class PrefService;
+
 namespace blimp {
 namespace client {
 
@@ -28,7 +33,12 @@ class BlimpClientContextDelegateLinux : public BlimpClientContextDelegate {
   void OnEngineDisconnected(int result) override;
   void OnNetworkDisconnected(int result) override;
 
+  PrefService* pref_service() { return pref_service_.get(); }
+
  private:
+  scoped_refptr<user_prefs::PrefRegistrySyncable> pref_registry_;
+  std::unique_ptr<PrefService> pref_service_;
+
   DISALLOW_COPY_AND_ASSIGN(BlimpClientContextDelegateLinux);
 };