[Offline Pages] Remove load state from public OfflinePageModel API.

components/offline_pages/core/offline_page_model.h

Index: components/offline_pages/core/offline_page_model.h
diff --git a/components/offline_pages/core/offline_page_model.h b/components/offline_pages/core/offline_page_model.h
index 584d81a9566c1e73eea61ba90600c5b4a2c8864b..6416564fd96da4bff4856bb9e827c3b30a14a6c5 100644
--- a/components/offline_pages/core/offline_page_model.h
+++ b/components/offline_pages/core/offline_page_model.h
@@ -75,9 +75,6 @@ class OfflinePageModel : public base::SupportsUserData {
   // Observer of the OfflinePageModel.
   class Observer {
    public:
-    // Invoked when the model has finished loading.
-    virtual void OfflinePageModelLoaded(OfflinePageModel* model) = 0;
-
     // Invoked when the model is being updated due to adding an offline page.
     virtual void OfflinePageAdded(OfflinePageModel* model,
                                   const OfflinePageItem& added_page) = 0;
@@ -108,16 +105,16 @@ class OfflinePageModel : public base::SupportsUserData {
 
   static const int64_t kInvalidOfflineId = 0;
 
-  // Attempts to save a page offline per |save_page_params|. Requires that the
-  // model is loaded.  Generates a new offline id or uses the proposed offline
-  // id in |save_page_params| and returns it.
+  // Attempts to save a page offline per |save_page_params|. Generates a new
+  // offline id or uses the proposed offline id in |save_page_params| and
+  // returns it.
   virtual void SavePage(const SavePageParams& save_page_params,
                         std::unique_ptr<OfflinePageArchiver> archiver,
                         const SavePageCallback& callback) = 0;
 
   // Marks that the offline page related to the passed |offline_id| has been
   // accessed. Its access info, including last access time and access count,
-  // will be updated. Requires that the model is loaded.
+  // will be updated.
   virtual void MarkPageAccessed(int64_t offline_id) = 0;
 
   // Deletes pages based on |offline_ids|.
@@ -171,9 +168,6 @@ class OfflinePageModel : public base::SupportsUserData {
   // Returns the policy controller.
   virtual ClientPolicyController* GetPolicyController() = 0;
 
-  // TODO(dougarnett): Remove this and its uses.
-  virtual bool is_loaded() const = 0;
-
   // Returns the logger. Ownership is retained by the model.
   virtual OfflineEventLogger* GetLogger() = 0;
 };