Pulling user experiment code from BrowserDistribution to a new class.

chrome/installer/util/chrome_browser_operations.h

Index: chrome/installer/util/chrome_browser_operations.h
diff --git a/chrome/installer/util/chrome_browser_operations.h b/chrome/installer/util/chrome_browser_operations.h
index 9c75a4e1cbac20f27033a274bf6b8f256c09d497..faeeceb2e4f49824b3157b01a4713afd9b13600e 100644
--- a/chrome/installer/util/chrome_browser_operations.h
+++ b/chrome/installer/util/chrome_browser_operations.h
@@ -50,6 +50,11 @@ class ChromeBrowserOperations : public ProductOperations {
       const base::FilePath& target_exe,
       ShellUtil::ShortcutProperties* properties) const OVERRIDE;
 
+  virtual void LaunchUserExperiment(const base::FilePath& setup_path,
+                                    const std::set<std::wstring>& options,
+                                    InstallStatus status,
+                                    bool system_level) const OVERRIDE;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserOperations);
 };