Show ExtensionID->OriginSyncStatus in syncfs-internals WebUI

chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h

Index: chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h
diff --git a/chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h b/chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h
index fca5cb9197307f74606630efbd413b0efd33ede4..5a0010a7dba1cffd339a953b66d097cf192e4261 100644
--- a/chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h
+++ b/chrome/browser/ui/webui/sync_file_system_internals/sync_file_system_internals_handler.h
@@ -12,12 +12,16 @@ class Profile;
 
 namespace syncfs_internals {
 
-// This class handles message from WebUI page of chrome://syncfs-internals/.
-// All methods in this class should be called on UI thread.
+// This class handles message from WebUI page of chrome://syncfs-internals/
+// for the Sync Service tab. It corresponds to browser/resources/
+// sync_file_system_internals/sync_service.html. All methods in this class
+// should be called on UI thread.
 class SyncFileSystemInternalsHandler : public content::WebUIMessageHandler {
  public:
   explicit SyncFileSystemInternalsHandler(Profile* profile);
   virtual ~SyncFileSystemInternalsHandler();
+
+  // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
  private:
@@ -32,6 +36,7 @@ class SyncFileSystemInternalsHandler : public content::WebUIMessageHandler {
 
   DISALLOW_COPY_AND_ASSIGN(SyncFileSystemInternalsHandler);
 };
-}  // syncfs_internals
+
+}  // namespace syncfs_internals
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_FILE_SYSTEM_INTERNALS_SYNC_FILE_SYSTEM_INTERNALS_HANDLER_H_