Pulling user experiment code from BrowserDistribution to a new class.

chrome/installer/util/user_experiment.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// This files declares a class that contains methods and data to conduct
+// for user expeirments.
+
+#ifndef CHROME_INSTALLER_UTIL_USER_EXPERIMENT_H_
+#define CHROME_INSTALLER_UTIL_USER_EXPERIMENT_H_
+
+#include "base/string16.h"
+#include "chrome/installer/util/util_constants.h"
+
+class BrowserDistribution;
+class CommandLine;
+
+namespace base {
+class FilePath;
+}
+
+namespace installer {
+
+class Product;
+
+// Flags to control what to show in the UserExperiment dialog.
+enum ToastUiFlags {
+  kToastUiUninstall          = 1 << 0,  // Uninstall radio button.
+  kToastUiDontBugMeAsButton  = 1 << 1,  // This is a button, not a radio button.
+  kToastUiWhyLink            = 1 << 2,  // Has the 'why I am seeing this' link.
+  kToastUiMakeDefault        = 1 << 3,  // Has the 'make it default' checkbox.
+};
+
+// A struct for communicating what a UserExperiment contains. In these
+// experiments we show toasts to the user if they are inactive for a certain
+// amount of time.
+struct ExperimentDetails {
+  string16 prefix;      // The experiment code prefix for this experiment,
+                        // also known as the 'TV' part in 'TV80'.
+  int flavor;           // The flavor index for this experiment.
+  int heading;          // The heading resource ID to use for this experiment.
+  int flags;            // See ToastUIFlags above.
+  int control_group;    // Size of the control group (in percentages). Control
+                        // group is the group that qualifies for the
+                        // experiment but does not participate.
+};
+
+// Creates the experiment details for a given language-brand combo.
+// If |flavor| is -1, then a flavor will be selected at random. |experiment|
+// is the struct you want to write the experiment information to.
+// Returns false if no experiment details could be gathered.
+bool CreateExperimentDetails(int flavor, ExperimentDetails* experiment);
+
+// 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.
+void LaunchBrowserUserExperiment(const CommandLine& base_command,
+                                 InstallStatus status,
+                                 bool system_level);
+
+// The user has qualified for the inactive user toast experiment and this
+// function just performs it.
+void InactiveUserToastExperiment(BrowserDistribution* dist,
+                                 int flavor,
+                                 const string16& experiment_group,
+                                 const Product& installation,
+                                 const base::FilePath& application_path);
+
+}  // namespace installer
+
+#endif  // CHROME_INSTALLER_UTIL_USER_EXPERIMENT_H_