Translate: language list smart updater

chrome/browser/translate/translate_language_list.h

Index: chrome/browser/translate/translate_language_list.h
diff --git a/chrome/browser/translate/translate_language_list.h b/chrome/browser/translate/translate_language_list.h
index c5ded072e542cbf8ef9f1fe4fdc9d7b3b7407c7a..a3f3a65d1d8dc6001dfc62b68fd64119b6ae20bb 100644
--- a/chrome/browser/translate/translate_language_list.h
+++ b/chrome/browser/translate/translate_language_list.h
@@ -11,13 +11,14 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
+#include "chrome/browser/web_resource/resource_request_allowed_notifier.h"
 
 class TranslateURLFetcher;
 
 // The TranslateLanguageList class is responsible for maintaining the latest
 // supporting language list.
 // This class is defined to be owned only by TranslateManager.
-class TranslateLanguageList {
+class TranslateLanguageList : public ResourceRequestAllowedNotifier::Observer {
  public:
   TranslateLanguageList();
   virtual ~TranslateLanguageList();
@@ -47,6 +48,12 @@ class TranslateLanguageList {
   // reach to limits.
   void RequestLanguageList();
 
+  // ResourceRequestAllowedNotifier::Observer implementation:
+  virtual void OnResourceRequestsAllowed() OVERRIDE;
+
+  // Disables the language list updater. This is used only for testing now.
+  static void DisableUpdate();
+
   // static const values shared with our browser tests.
   static const char kLanguageListCallbackName[];
   static const char kTargetLanguagesKey[];
@@ -82,6 +89,9 @@ class TranslateLanguageList {
   // The last-updated time when the language list is sent.
   base::Time last_updated_;
 
+  // Helper class to know if it's allowed to make network resource requests.
+  ResourceRequestAllowedNotifier resource_request_allowed_notifier_;
+
   DISALLOW_COPY_AND_ASSIGN(TranslateLanguageList);
 };