[ios] Adds a feature flag for policy support.

BUG=1024115

Change-Id: Ib9f9491d7650dba83d6cbc7ae822eaf04f907b92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2057116
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742218}

ios/chrome/browser/flags/BUILD.gn

@@ -45,6 +45,7 @@ source_set("flags") {
     "//ios/chrome/browser/drag_and_drop",
     "//ios/chrome/browser/find_in_page:feature_flags",
     "//ios/chrome/browser/passwords:feature_flags",
+    "//ios/chrome/browser/policy:feature_flags",
     "//ios/chrome/browser/ui:feature_flags",
     "//ios/chrome/browser/ui/dialogs:feature_flags",
     "//ios/chrome/browser/ui/fullscreen:feature_flags",

ios/chrome/browser/flags/about_flags.mm

@@ -56,6 +56,7 @@
 #include "ios/chrome/browser/find_in_page/features.h"
 #include "ios/chrome/browser/flags/ios_chrome_flag_descriptions.h"
 #include "ios/chrome/browser/passwords/password_manager_features.h"
+#include "ios/chrome/browser/policy/policy_features.h"
 #include "ios/chrome/browser/system_flags.h"
 #import "ios/chrome/browser/ui/dialogs/dialog_features.h"
 #import "ios/chrome/browser/ui/fullscreen/fullscreen_features.h"
@@ -593,6 +594,9 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
      flags_ui::kOsIos,
      FEATURE_VALUE_TYPE(
          fullscreen::features::kFullscreenControllerBrowserScoped)},
+    {"enterprise-policy-ios", flag_descriptions::kEnterprisePolicyIOSName,
+     flag_descriptions::kEnterprisePolicyIOSDescription, flags_ui::kOsIos,
+     FEATURE_VALUE_TYPE(kEnterprisePolicyIOS)},
 };
 
 // Add all switches from experimental flags to |command_line|.

ios/chrome/browser/flags/ios_chrome_flag_descriptions.cc

@@ -232,6 +232,10 @@ const char kEnableSyncUSSNigoriName[] = "Enable USS for sync encryption keys";
 const char kEnableSyncUSSNigoriDescription[] =
     "Enables the new, experimental implementation of sync encryption keys";
 
+const char kEnterprisePolicyIOSName[] = "Enable enterprise policy";
+const char kEnterprisePolicyIOSDescription[] =
+    "When enabled, enterprise policies will be loaded and respected.";
+
 const char kFindInPageiFrameName[] = "Find in Page in iFrames.";
 const char kFindInPageiFrameDescription[] =
     "When enabled, Find In Page will search in iFrames.";

ios/chrome/browser/flags/ios_chrome_flag_descriptions.h

@@ -196,6 +196,10 @@ extern const char kEnableSyncUSSPasswordsDescription[];
 extern const char kEnableSyncUSSNigoriName[];
 extern const char kEnableSyncUSSNigoriDescription[];
 
+// Title and description for the flag to enable enterprise policy.
+extern const char kEnterprisePolicyIOSName[];
+extern const char kEnterprisePolicyIOSDescription[];
+
 // Title and description for the flag to search in iFrames in Find In Page.
 extern const char kFindInPageiFrameName[];
 extern const char kFindInPageiFrameDescription[];

ios/chrome/browser/policy/BUILD.gn

+# Copyright 2020 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.
+
+source_set("feature_flags") {
+  configs += [ "//build/config/compiler:enable_arc" ]
+  sources = [
+    "policy_features.cc",
+    "policy_features.h",
+  ]
+  deps = [ "//base" ]
+}

ios/chrome/browser/policy/policy_features.cc

+// Copyright 2020 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 "ios/chrome/browser/policy/policy_features.h"
+
+const base::Feature kEnterprisePolicyIOS{"EnterprisePolicyIOS",
+                                         base::FEATURE_DISABLED_BY_DEFAULT};

ios/chrome/browser/policy/policy_features.h

+// Copyright 2020 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.
+
+#ifndef IOS_CHROME_BROWSER_POLICY_POLICY_FEATURES_H_
+#define IOS_CHROME_BROWSER_POLICY_POLICY_FEATURES_H_
+
+#include "base/feature_list.h"
+
+// Feature flag to enable enterprise policy on iOS.
+extern const base::Feature kEnterprisePolicyIOS;
+
+#endif  // IOS_CHROME_BROWSER_POLICY_POLICY_FEATURES_H_