Pulling user experiment code from BrowserDistribution to a new class.

chrome/installer/util/chrome_app_host_operations.cc

Index: chrome/installer/util/chrome_app_host_operations.cc
diff --git a/chrome/installer/util/chrome_app_host_operations.cc b/chrome/installer/util/chrome_app_host_operations.cc
index 3690196cd422ac33e7899e398638b17c9e695a50..a207b4f49b8ae3d61b5782aca0c083380ff4e5c5 100644
--- a/chrome/installer/util/chrome_app_host_operations.cc
+++ b/chrome/installer/util/chrome_app_host_operations.cc
@@ -120,4 +120,13 @@ void ChromeAppHostOperations::AddDefaultShortcutProperties(
   }
 }
 
+void ChromeAppHostOperations::LaunchUserExperiment(
+    const base::FilePath& setup_path,
+    const std::set<std::wstring>& options,
+    BrowserDistribution* dist,
+    InstallStatus status,
+    bool system_level) const {
+  NOTREACHED() << "Chrome App Launcher does not launch user experiments.";

[grt (UTC plus 2), 2013/03/12 14:32:18]

please switch to:
  // Explanatory comment.
  NOTREACHED();
here and elsewhere. i am now of the mind that these strings on NOTREACHED() add
no value. thanks.

[huangs, 2013/03/12 18:03:07]

Done.

+}
+
 }  // namespace installer