This adds a recovery mode to the diagnostics

chrome/browser/diagnostics/diagnostics_test.h

 // Copyright (c) 2011 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 CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_
 #define CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/diagnostics/diagnostics_model.h"
 
@@ skipping 21 matching lines @@
   // test is.
   DiagnosticsTest(const std::string& id, const std::string& title);
 
   virtual ~DiagnosticsTest();
 
   // Runs the test. Returning false signals that no more tests should be run.
   // The actual outcome of the test should be set using the RecordXX functions.
   bool Execute(DiagnosticsModel::Observer* observer, DiagnosticsModel* model,
                size_t index);
 
+  // Runs any recovery steps for the test. Returning false signals that no more
+  // recovery should be attempted.
+  bool Recover(DiagnosticsModel::Observer* observer, DiagnosticsModel* model,
+               size_t index);
+
   void RecordStopFailure(int outcome_code, const std::string& additional_info) {
     RecordOutcome(
         outcome_code, additional_info, DiagnosticsModel::TEST_FAIL_STOP);
   }
 
   void RecordFailure(int outcome_code, const std::string& additional_info) {
     RecordOutcome(
         outcome_code, additional_info, DiagnosticsModel::TEST_FAIL_CONTINUE);
   }
 
@@ skipping 12 matching lines @@
   virtual std::string GetTitle() const OVERRIDE;
   virtual DiagnosticsModel::TestResult GetResult() const OVERRIDE;
   virtual std::string GetAdditionalInfo() const OVERRIDE;
   virtual int GetOutcomeCode() const OVERRIDE;
   virtual base::Time GetStartTime() const OVERRIDE;
   virtual base::Time GetEndTime() const OVERRIDE;
  protected:
   // Derived classes override this method do perform the actual test.
   virtual bool ExecuteImpl(DiagnosticsModel::Observer* observer) = 0;
 
+  // Derived classes may override this method to perform a recovery, if recovery
+  // makes sense for the diagnostics test.
+  virtual bool RecoveryImpl(DiagnosticsModel::Observer* observer);
+
   const std::string id_;
   const std::string title_;
   std::string additional_info_;
   int outcome_code_;
   DiagnosticsModel::TestResult result_;
   base::Time start_time_;
   base::Time end_time_;
 };
 
 }  // namespace diagnostics
 #endif  // CHROME_BROWSER_DIAGNOSTICS_DIAGNOSTICS_TEST_H_