ui: Cleanup class/struct forward declarations

blimp/client/core/context/blimp_client_context_impl.h

Index: blimp/client/core/context/blimp_client_context_impl.h
diff --git a/blimp/client/core/context/blimp_client_context_impl.h b/blimp/client/core/context/blimp_client_context_impl.h
index 55135eae8976697014072d50796b9b816b5676e9..b993556cd9ee7977aa2ddbd712a372dadfc3cb33 100644
--- a/blimp/client/core/context/blimp_client_context_impl.h
+++ b/blimp/client/core/context/blimp_client_context_impl.h
@@ -56,7 +56,7 @@ class BlimpClientContextImpl
       scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
       std::unique_ptr<CompositorDependencies> compositor_dependencies,
-      PrefService* local_state);
+      std::unique_ptr<Settings> settings);
   ~BlimpClientContextImpl() override;
 
   // BlimpClientContext implementation.
@@ -78,6 +78,8 @@ class BlimpClientContextImpl
   IdentitySource* GetIdentitySource() override;
   ConnectionStatus* GetConnectionStatus() override;
 
+  Settings* settings() { return settings_.get(); }
+
  private:
   // Called when the AssignmentSource is finished getting an Assignment.  Will
   // then call |ConnectWithAssignment| to initiate the actual connection.