Additional error logs to track webstore response failures.

chrome/browser/chromeos/app_mode/kiosk_app_data.h

Index: chrome/browser/chromeos/app_mode/kiosk_app_data.h
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_data.h b/chrome/browser/chromeos/app_mode/kiosk_app_data.h
index 9214dac7c3344b718d62c84bed31822d3f1f1a6d..f9ab7771968cca36920fa448fe7f3941a13a5793 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_data.h
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_data.h
@@ -100,6 +100,13 @@ class KioskAppData : public base::SupportsWeakPtr<KioskAppData>,
   virtual void OnWebstoreResponseParseFailure(
       const std::string& error) OVERRIDE;
 
+  // Helper function for testing for the existence of |key| in
+  // |response|. Passes |key|'s content via |value| and returns
+  // true when |key| is present.
+  bool CheckResponseKeyValue(const base::DictionaryValue* response,
+                             const char* key,
+                             std::string* value);
+
   KioskAppDataDelegate* delegate_;  // not owned.
   Status status_;