Enable fluent language model by default.

Bug: 872096
Change-Id: I9401f3ea3b88c86a959eee3d59c8faedd3e764de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1772320Reviewed-by: anthonyvd <anthonyvd@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Alexandre Frechette <frechette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695317}

components/language/core/common/language_experiments.cc

@@ -10,6 +10,7 @@
 #include "base/metrics/field_trial_params.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
+#include "build/build_config.h"
 
 namespace language {
 // Features:
@@ -21,8 +22,14 @@ const base::Feature kExplicitLanguageAsk{"ExplicitLanguageAsk",
                                          base::FEATURE_DISABLED_BY_DEFAULT};
 const base::Feature kImprovedGeoLanguageData{"ImprovedGeoLanguageData",
                                              base::FEATURE_ENABLED_BY_DEFAULT};
-const base::Feature kUseFluentLanguageModel{"UseFluentLanguageModel",
-                                            base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kUseFluentLanguageModel {
+  "UseFluentLanguageModel",
+#if defined(OS_IOS)
+      base::FEATURE_DISABLED_BY_DEFAULT
+#else
+      base::FEATURE_ENABLED_BY_DEFAULT
+#endif
+};
 const base::Feature kNotifySyncOnLanguageDetermined{
     "NotifySyncOnLanguageDetermined", base::FEATURE_ENABLED_BY_DEFAULT};
 

testing/variations/fieldtrial_testing_config.json

@@ -6172,25 +6172,6 @@
             ]
         }
     ],
-    "UseFluentLanguageModel": [
-        {
-            "platforms": [
-                "windows",
-                "mac",
-                "chromeos",
-                "linux",
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "UseFluentLanguageModel"
-                    ]
-                }
-            ]
-        }
-    ],
     "UsePdfCompositorServiceForPrint": [
         {
             "platforms": [