Add support for the ExperimentalSwReporterEngine field trial.

chrome/browser/safe_browsing/srt_fetcher_win.h

Index: chrome/browser/safe_browsing/srt_fetcher_win.h
diff --git a/chrome/browser/safe_browsing/srt_fetcher_win.h b/chrome/browser/safe_browsing/srt_fetcher_win.h
index 8141ebb115b6bca9fe9be629709b6f613451703a..c8c04a848e5b6ed7a33e957541a1a04daaa35bcc 100644
--- a/chrome/browser/safe_browsing/srt_fetcher_win.h
+++ b/chrome/browser/safe_browsing/srt_fetcher_win.h
@@ -7,6 +7,7 @@
 
 #include <limits.h>
 
+#include <queue>
 #include <string>
 
 #include "base/callback_forward.h"
@@ -48,6 +49,15 @@ const int kSRTFetcherID = 47;
 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;
+
   SwReporterInvocation();
   explicit SwReporterInvocation(const base::FilePath& exe_path);
   explicit SwReporterInvocation(const base::CommandLine& command_line);
@@ -68,6 +78,24 @@ void RunSwReporter(const SwReporterInvocation& invocation,
                    scoped_refptr<base::TaskRunner> main_thread_task_runner,
                    scoped_refptr<base::TaskRunner> blocking_task_runner);
 
+// Try to run multiple invocations of the sw_reporter component, with different
+// combinations of command line args. Each set of invocations is treated as a
+// normal scheduled launch of the sw_reporter for the purposes of retries, as
+// described in |RunSwReporter|.
+//
+// |invocations| is a list of sw_reporter configurations which will be launched
+// in order. Once one has been executed, the reporter is considered to have
+// "run" - the remainder will also be executed as part of this run, but then
+// the reporter will not be run again for the specified period. If none of the
+// invocations in the queue execute, another queue can be tried by calling this
+// function again.
+//
+// See |RunSwReporter| for the meaning of the remaining parameters.
+void RunSwReporters(const std::queue<SwReporterInvocation>& invocations,
+                    const base::Version& version,
+                    scoped_refptr<base::TaskRunner> main_thread_task_runner,
+                    scoped_refptr<base::TaskRunner> blocking_task_runner);
+
 // Returns true iff Local State is successfully accessed and indicates the most
 // recent Reporter run terminated with an exit code indicating the presence of
 // UwS.