Storage manager: Show the disk usage of other users.

chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h

Index: chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h
diff --git a/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h b/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h
index 655ba62ad5841ad06f16a0061b6d76191c20ad0c..332bd0913d3043bb1db4b0c2e38dba73c090133b 100644
--- a/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h
+++ b/chrome/browser/ui/webui/options/chromeos/storage_manager_handler.h
@@ -9,6 +9,7 @@
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "components/arc/storage_manager/arc_storage_manager.h"
+#include "components/user_manager/user.h"
 
 namespace chromeos {
 namespace options {
@@ -65,6 +66,12 @@ class StorageManagerHandler : public ::options::OptionsPageUIHandler {
   // Callback to update the UI about the size of browsing data.
   void OnGetBrowsingDataSize(bool is_site_data, int64_t size);
 
+  // Requests updating the total size of other users' data.
+  void UpdateOtherUsersSize();
+
+  // Callback to save the fetched user sizes and update the UI.
+  void OnGetOtherUserSize(bool success, int64_t size);
+
   // Requests updating the space size used by Android apps and cache.
   void UpdateArcSize();
 
@@ -80,6 +87,13 @@ class StorageManagerHandler : public ::options::OptionsPageUIHandler {
   // Total size of site data in browsing data.
   int64_t browser_site_data_size_;
 
+  // The list of other users whose directory sizes will be accumulated as the
+  // size of "Other users".
+  user_manager::UserList other_users_;
+
+  // Fetched sizes of user directories.
+  std::vector<int64_t> user_sizes_;
+
   base::WeakPtrFactory<StorageManagerHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(StorageManagerHandler);