Offer user to send feedback from profile error dialog

components/webdata/common/web_database_backend.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_
 #define COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_
 
 #include <memory>
 
 #include "base/callback_forward.h"
@@ skipping 21 matching lines @@
 // DB thread.
 
 class WEBDATA_EXPORT WebDatabaseBackend
     : public base::RefCountedDeleteOnMessageLoop<WebDatabaseBackend> {
  public:
   class Delegate {
    public:
     virtual ~Delegate() {}
 
     // Invoked when the backend has finished loading the db.
-    virtual void DBLoaded(sql::InitStatus status) = 0;
+    virtual void DBLoaded(sql::InitStatus status,
+                          const sql::DatabaseDiagnosticMap& diagnostics) = 0;

[michaeln, 2016/07/09 03:00:38]

could use a comment about |diagnostics| only being populated in the error case
(assuming that's the case and we don't run the diagnostics upon success)

[afakhry, 2016/07/11 16:47:45]

Done.

   };
 
   WebDatabaseBackend(
       const base::FilePath& path,
       Delegate* delegate,
       const scoped_refptr<base::SingleThreadTaskRunner>& db_thread);
 
   // Must call only before InitDatabaseWithCallback.
   void AddTable(std::unique_ptr<WebDatabaseTable> table);
 
@@ skipping 55 matching lines @@
 
   std::unique_ptr<WebDatabase> db_;
 
   // Keeps track of all pending requests made to the db.
   scoped_refptr<WebDataRequestManager> request_manager_;
 
   // State of database initialization. Used to prevent the executing of tasks
   // before the db is ready.
   sql::InitStatus init_status_;
 
+  // Contains diagnostic information about the database that will be filled when
+  // a catastrophic error occurs.
+  sql::DatabaseDiagnosticMap db_diagnostics_;
+
   // True if an attempt has been made to load the database (even if the attempt
   // fails), used to avoid continually trying to reinit if the db init fails.
   bool init_complete_;
 
   // Delegate. See the class definition above for more information.
   std::unique_ptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(WebDatabaseBackend);
 };
 
 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_BACKEND_H_