Support experiment control of profile-management flags.

chrome/common/profile_management_switches.cc

 // 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.
 
 #include "chrome/common/profile_management_switches.h"
 
 #include "base/command_line.h"
+#include "base/metrics/field_trial.h"
 #include "chrome/common/chrome_switches.h"
 
+namespace {
+
+const char kNewProfileManagementFieldTrialName[] = "NewProfileManagement";
+
+bool CheckProfileManagementFlag(std::string command_switch, bool negate) {
+  std::string trial_type =
+      base::FieldTrialList::FindFullName(kNewProfileManagementFieldTrialName);
+  if (!trial_type.empty()) {
+    if (trial_type == "Enabled")
+      return true ^ negate;
+    if (trial_type == "Disabled")
+      return false ^ negate;

[Roger Tawa OOO till Jul 10th, 2014/01/07 17:01:54]

Nit: since:
  true^negate == !negate
  false^negate == negate

I would suggest using the RHS expressions since they are simpler.

[bcwhite, 2014/01/07 21:23:20]

Done.

+  }
+  return CommandLine::ForCurrentProcess()->HasSwitch(command_switch);
+}
+
+}  // namespace
+
 namespace switches {
 
-bool IsEnableInlineSignin() {
-  return !CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableWebBasedSignin);
+bool IsEnableWebBasedSignin() {
+  return CheckProfileManagementFlag(switches::kEnableWebBasedSignin, true);
 }
 
 bool IsGoogleProfileInfo() {
-  return CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kGoogleProfileInfo);
+  return CheckProfileManagementFlag(switches::kGoogleProfileInfo, false);
 }
 
 bool IsNewProfileManagement() {
-  return CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kNewProfileManagement);
+  return CheckProfileManagementFlag(switches::kNewProfileManagement, false);
 }
 
 }  // namespace switches