Added 'contextReady' message for HostPairingScreen.

chrome/browser/ui/webui/chromeos/login/host_pairing_screen_handler.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/chromeos/login/screens/host_pairing_screen_actor.h"
+#include "chrome/browser/chromeos/login/screens/screen_context.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 
 namespace chromeos {
 
 class HostPairingScreenHandler : public HostPairingScreenActor,
                                  public BaseScreenHandler {
  public:
   HostPairingScreenHandler();
   virtual ~HostPairingScreenHandler();
 
  private:
+  void HandleContextReady();
+
   // Overridden from BaseScreenHandler:
   virtual void Initialize() OVERRIDE;
   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
 
   // Overridden from content::WebUIMessageHandler:
   virtual void RegisterMessages() OVERRIDE;
 
   // Overridden from HostPairingScreenActor:
   virtual void Show() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void SetDelegate(Delegate* delegate) OVERRIDE;
   virtual void OnContextChanged(const base::DictionaryValue& diff) OVERRIDE;
 
   HostPairingScreenActor::Delegate* delegate_;
   bool show_on_init_;
+  bool context_ready_;

[ygorshenin1, 2014/09/18 16:51:48]

This name doesn't reflect the fact that it's JS part of the context is ready.
Could you please rename it to something like js_context_ready_?

[dzhioev (left Google), 2014/09/19 15:54:04]

Done.

+
+  // Caches context changes while JS part is not ready to receive messages.
+  ScreenContext context_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(HostPairingScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_