[ios] Enable SlimNav and dependent features by default.

Tentatively enabling this by default for M79.

Bug: 789582
Change-Id: I030902ddbb1a19f5b49a847b727c439cfd10fcf9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1787885Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694620}

ios/chrome/browser/metrics/features.cc

@@ -5,4 +5,4 @@
 #include "ios/chrome/browser/metrics/features.h"
 
 const base::Feature kLogLoadStartedInDidStartNavigation{
-    "LogLoadStartedInDidStartNavigation", base::FEATURE_DISABLED_BY_DEFAULT};
+    "LogLoadStartedInDidStartNavigation", base::FEATURE_ENABLED_BY_DEFAULT};

ios/chrome/browser/reading_list/features.cc

@@ -10,7 +10,7 @@
 namespace reading_list {
 
 const base::Feature kOfflineVersionWithoutNativeContent{
-    "OfflineVersionWithoutNativeContent", base::FEATURE_DISABLED_BY_DEFAULT};
+    "OfflineVersionWithoutNativeContent", base::FEATURE_ENABLED_BY_DEFAULT};
 
 bool IsOfflinePageWithoutNativeContentEnabled() {
   return base::FeatureList::IsEnabled(kOfflineVersionWithoutNativeContent) ||

ios/web/common/features.mm

@@ -15,7 +15,7 @@ const base::Feature kIgnoresViewportScaleLimits{
     "IgnoresViewportScaleLimits", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kSlimNavigationManager{"SlimNavigationManager",
-                                           base::FEATURE_DISABLED_BY_DEFAULT};
+                                           base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kWKHTTPSystemCookieStore{"WKHTTPSystemCookieStore",
                                              base::FEATURE_ENABLED_BY_DEFAULT};