Add support for the ExperimentalSwReporterEngine field trial.

chrome/browser/safe_browsing/srt_fetcher_win.h

 // Copyright 2015 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_SAFE_BROWSING_SRT_FETCHER_WIN_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SRT_FETCHER_WIN_H_
 
 #include <limits.h>
 
 #include <string>
@@ skipping 27 matching lines @@
 const int kReporterFailureExitCode = INT_MAX;
 
 // The number of days to wait before triggering another reporter run.
 const int kDaysBetweenSuccessfulSwReporterRuns = 7;
 const int kDaysBetweenSwReporterRunsForPendingPrompt = 1;
 
 // Parameters used to invoke the sw_reporter component.
 struct SwReporterInvocation {
   base::CommandLine command_line;
 
+  // Experimental versions of the reporter will write metrics to registry keys
+  // ending in |suffix|. Those metrics should be copied to UMA histograms also
+  // ending in |suffix|. For the canonical version, |suffix| will be empty.
+  std::string suffix;
+
+  // The experimental sw_reporter never triggers the prompt, just reports
+  // results through UMA.
+  bool is_experimental = false;
+
   SwReporterInvocation();
 
   static SwReporterInvocation FromFilePath(const base::FilePath& exe_path);
   static SwReporterInvocation FromCommandLine(
       const base::CommandLine& command_line);
 
   bool operator==(const SwReporterInvocation& other) const;
 };
 
 // Tries to run the sw_reporter component, and then schedule the next try. If
@@ skipping 41 matching lines @@
 
 // Set a delegate for testing. The implementation will not take ownership of
 // |delegate| - it must remain valid until this function is called again to
 // reset the delegate. If |delegate| is nullptr, any previous delegate is
 // cleared.
 void SetSwReporterTestingDelegate(SwReporterTestingDelegate* delegate);
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SRT_FETCHER_WIN_H_