[iOS] Enable WebPageTextAccessibility by default for stable launch

Bug: 1049559
Change-Id: Iffda7ed060a5e6220efd1d2ab3b322a3c105d08c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2254279Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Robbie Gibson <rkgibson@google.com>
Cr-Commit-Position: refs/heads/master@{#780781}

ios/chrome/browser/ui/popup_menu/popup_menu_mediator_unittest.mm

@@ -262,6 +262,12 @@ TEST_F(PopupMenuMediatorTest, TestToolsMenuItemsCount) {
           ->IsUserFeedbackEnabled()) {
     number_of_action_items++;
   }
+
+  // Text zoom is currently disabled on iPad. See crbug.com/1061119.
+  if (ui::GetDeviceFormFactor() != ui::DEVICE_FORM_FACTOR_TABLET) {
+    number_of_action_items++;
+  }
+
   // Checks that Tools Menu has the right number of items in each section.
   CheckMediatorSetItems(@[
     // Stop/Reload, New Tab, New Incognito Tab

ios/chrome/browser/web/features.cc

@@ -6,8 +6,8 @@
 
 namespace web {
 
-const base::Feature kWebPageTextAccessibility{
-    "WebPageTextAccessibility", base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kWebPageTextAccessibility{"WebPageTextAccessibility",
+                                              base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kMobileGoogleSRP{"MobileGoogleSRP",
                                      base::FEATURE_DISABLED_BY_DEFAULT};

testing/variations/fieldtrial_testing_config.json

@@ -3274,21 +3274,6 @@
             ]
         }
     ],
-    "IOSWebPageTextAccessibility": [
-        {
-            "platforms": [
-                "ios"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "WebPageTextAccessibility"
-                    ]
-                }
-            ]
-        }
-    ],
     "IdentityDiscIPH": [
         {
             "platforms": [