[Offline pages] Moving disk size related calls to Archive Manager, reorganizing UMA

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 d03168eed701f7021aa233d000e2595fbddbd36f..0c54543bc06dfc0907282c8d882941c2c66fa700 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -213,17 +213,6 @@ class OfflinePageModel : public KeyedService,
   // observers.
   void CheckForExternalFileDeletion();
 
-  // Reports the storage histograms related to total size of all stored offline
-  // pages. Method is to be called after a page was saved or some pages are
-  // deleted. In the latter case |reporting_after_delete| is set to true.
-  // Caller is supposed to provide the current |total_space_bytes| on drive
-  // where the pages are stored, as well as |free_space_bytes| after the
-  // operation was taken. The method will report total size of all pages, and
-  // percentage of size of pages as compared to total space and free space.
-  void RecordStorageHistograms(int64_t total_space_bytes,
-                               int64_t free_space_bytes,
-                               bool reporting_after_delete);
-
   // Returns the policy controller.
   ClientPolicyController* GetPolicyController();