[ios] Add EditBookmarksEnabled enterprise policy handler

EditBookmarksEnabled is an enterprise policy that determines whether
the user can edit any bookmarks. The policy is mapped to a user pref.

This CL is part of a series of CLs that add support for this
enterprise policy on the iOS platform.

This CL:
- Turns on iOS support for EditBookmarksEnabled.
- Adds EditBookmarksEnabled to basic policy handler policy map.
- Adds basic test via json test cases.

Bug: 1072326
Change-Id: I1b03db4ee2d808bf5c4c7bbe039cf3346d98c9b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2156138
Commit-Queue: edchin <edchin@chromium.org>
Reviewed-by: Owen Min <zmin@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760600}

components/policy/resources/policy_templates.json

@@ -6738,7 +6738,12 @@
       'owners': ['file://components/policy/resources/OWNERS'],
       'type': 'main',
       'schema': { 'type': 'boolean' },
-      'supported_on': ['chrome.*:12-', 'chrome_os:12-', 'android:30-'],
+      'supported_on': [
+        'chrome.*:12-',
+        'chrome_os:12-',
+        'android:30-',
+        'ios:83-'
+      ],
       'features': {
         'dynamic_refresh': True,
         'per_profile': True,

ios/chrome/browser/policy/BUILD.gn

@@ -21,6 +21,7 @@ source_set("policy") {
   deps = [
     "//base",
     "//components/autofill/core/browser",
+    "//components/bookmarks/common",
     "//components/bookmarks/managed",
     "//components/password_manager/core/common",
     "//components/policy:generated",

ios/chrome/browser/policy/configuration_policy_handler_list_factory.mm

@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "components/autofill/core/browser/autofill_credit_card_policy_handler.h"
+#include "components/bookmarks/common/bookmark_pref_names.h"
 #include "components/bookmarks/managed/managed_bookmarks_policy_handler.h"
 #include "components/password_manager/core/common/password_manager_pref_names.h"
 #include "components/policy/core/browser/configuration_policy_handler.h"
@@ -29,6 +30,9 @@ namespace {
 // that directly map to a single preference.
 // clang-format off
 const PolicyToPreferenceMapEntry kSimplePolicyMap[] = {
+  { policy::key::kEditBookmarksEnabled,
+    bookmarks::prefs::kEditBookmarksEnabled,
+    base::Value::Type::BOOLEAN },
   { policy::key::kPasswordManagerEnabled,
     password_manager::prefs::kCredentialsEnableService,
     base::Value::Type::BOOLEAN },

ios/chrome/test/data/policy/policy_test_cases.json

@@ -35,6 +35,16 @@
     ]
   },
 
+  "EditBookmarksEnabled": {
+    "os": [ "ios" ],
+    "policy_pref_mapping_test": [
+      {
+        "policies": { "EditBookmarksEnabled": false },
+        "prefs": { "bookmarks.editing_enabled": {} }
+      }
+    ]
+  },
+
   "PasswordManagerEnabled": {
     "os": [ "ios" ],
     "can_be_recommended": true,