Pulling user experiment code from BrowserDistribution to a new class.

chrome/installer/util/product_operations.h

Index: chrome/installer/util/product_operations.h
diff --git a/chrome/installer/util/product_operations.h b/chrome/installer/util/product_operations.h
index 77d094b6293877b1c8b1e56ecf2bf57899d91c19..6fefd9d2149323df7c0718df9816d44928796e74 100644
--- a/chrome/installer/util/product_operations.h
+++ b/chrome/installer/util/product_operations.h
@@ -11,6 +11,7 @@
 
 #include "base/files/file_path.h"
 #include "chrome/installer/util/shell_util.h"
+#include "chrome/installer/util/util_constants.h"
 
 class BrowserDistribution;
 class CommandLine;
@@ -81,6 +82,14 @@ class ProductOperations {
       BrowserDistribution* dist,
       const base::FilePath& target_exe,
       ShellUtil::ShortcutProperties* properties) const = 0;
+
+  // After an install or upgrade the user might qualify to participate in an
+  // experiment. This function determines if the user qualifies and if so it
+  // sets the wheels in motion or in simple cases does the experiment itself.
+  virtual void LaunchUserExperiment(const base::FilePath& setup_path,
+                                    const std::set<std::wstring>& options,
+                                    InstallStatus status,
+                                    bool system_level) const = 0;
 };
 
 }  // namespace installer