Pulling user experiment code from BrowserDistribution to a new class.

chrome/installer/setup/setup_main.cc

Index: chrome/installer/setup/setup_main.cc
diff --git a/chrome/installer/setup/setup_main.cc b/chrome/installer/setup/setup_main.cc
index 12fd98d907ef58013a7723727b809ffd55c2436a..7a4ccbfc89a304709cf3abff4d7a9df8ff916679 100644
--- a/chrome/installer/setup/setup_main.cc
+++ b/chrome/installer/setup/setup_main.cc
@@ -60,6 +60,7 @@
 #include "chrome/installer/util/master_preferences_constants.h"
 #include "chrome/installer/util/self_cleaning_temp_dir.h"
 #include "chrome/installer/util/shell_util.h"
+#include "chrome/installer/util/user_experiment.h"
 #include "chrome/installer/util/util_constants.h"
 
 #include "installer_util_strings.h"  // NOLINT
@@ -922,9 +923,14 @@ installer::InstallStatus InstallProductsHelper(
       }
       for (Products::const_iterator it = products.begin(); it < products.end();
            ++it) {
+        using installer::user_experiment::UserExperiment;
         const Product& product = **it;
-        product.distribution()->LaunchUserExperiment(setup_path,
-            install_status, *installer_version, product, system_install);
+        if (UserExperiment::IsExperimentSupported(
+                product.distribution()->GetType(),
+                UserExperiment::kExperimentAny)) {
+          UserExperiment::LaunchUserExperiment(setup_path,
+              install_status, *installer_version, product, system_install);
+        }
       }
     }
   }
@@ -1239,6 +1245,7 @@ bool HandleNonInstallCmdLineOptions(const InstallationState& original_state,
                                     const CommandLine& cmd_line,
                                     InstallerState* installer_state,
                                     int* exit_code) {
+  using installer::user_experiment::UserExperiment;
   // TODO(gab): Add a local |status| variable which each block below sets;
   // only determine the |exit_code| from |status| at the end (this will allow
   // this method to validate that
@@ -1429,9 +1436,12 @@ bool HandleNonInstallCmdLineOptions(const InstallationState& original_state,
            ++it) {
         const Product& product = **it;
         BrowserDistribution* browser_dist = product.distribution();
-        browser_dist->InactiveUserToastExperiment(
-            flavor, ASCIIToUTF16(experiment_group), product,
-            installer_state->target_path());
+        if (UserExperiment::IsExperimentSupported(browser_dist->GetType(),
+                UserExperiment::kExperimentInactiveUserToast)) {
+          UserExperiment::InactiveUserToastExperiment(
+              browser_dist, flavor, ASCIIToUTF16(experiment_group), product,
+              installer_state->target_path());
+        }
       }
     }
   } else if (cmd_line.HasSwitch(installer::switches::kSystemLevelToast)) {
@@ -1449,9 +1459,11 @@ bool HandleNonInstallCmdLineOptions(const InstallationState& original_state,
                    << browser_dist->GetAppShortCutName()
                    << " found for system-level toast.";
       } else {
-        browser_dist->LaunchUserExperiment(cmd_line.GetProgram(),
-                                           installer::REENTRY_SYS_UPDATE,
-                                           installed_version, product, true);
+        if (UserExperiment::IsExperimentSupported(browser_dist->GetType(),
+                UserExperiment::kExperimentAny)) {
+          UserExperiment::LaunchUserExperiment(cmd_line.GetProgram(),
+              installer::REENTRY_SYS_UPDATE, installed_version, product, true);
+        }
       }
     }
   } else if (cmd_line.HasSwitch(