OfflinePageModel cleanups - improved CanSavePage() and moved static kInvalidOfflineId to impl

components/offline_pages/offline_page_model.h

Index: components/offline_pages/offline_page_model.h
diff --git a/components/offline_pages/offline_page_model.h b/components/offline_pages/offline_page_model.h
index 29107e0ac8135d1672cea86259277206246fe1a6..03624f7919d39d1b3abab1185f886567e13110e8 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -25,7 +25,6 @@ class Time;
 namespace offline_pages {
 
 static const char* const kBookmarkNamespace = "bookmark";
-static const int64_t kInvalidOfflineId = 0;
 
 struct ClientId;
 struct OfflinePageItem;
@@ -79,10 +78,6 @@ class OfflinePageModel : public base::SupportsUserData,
   using DeletePageResult = offline_pages::DeletePageResult;
   using SavePageResult = offline_pages::SavePageResult;
 
-  // Returns true if an offline copy can be saved for the given URL.
-  // TODO(dougarnett): Consider renaming and moving to Utils.
-  static bool CanSavePage(const GURL& url);
-
   OfflinePageModel();
   ~OfflinePageModel() override;