Enable SharingUseDeviceInfo by default

- Also updated experiment group name for UnidoOnSignInV2 to prepare for
  http://cl/295704680

Bug: 1050189
Change-Id: I5187505b2691d3f71e62a62bf8996d7bd5fc4940
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062329Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Alex Chau <alexchau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742216}

chrome/browser/sharing/features.cc

@@ -5,7 +5,7 @@
 #include "chrome/browser/sharing/features.h"
 
 const base::Feature kSharingUseDeviceInfo{"SharingUseDeviceInfo",
-                                          base::FEATURE_DISABLED_BY_DEFAULT};
+                                          base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kSharingQRCodeGenerator{"SharingQRCodeGenerator",
                                             base::FEATURE_DISABLED_BY_DEFAULT};

testing/variations/fieldtrial_testing_config.json

@@ -7139,7 +7139,7 @@
             ],
             "experiments": [
                 {
-                    "name": "Enabled_2020-02-06",
+                    "name": "Enabled_2020-02-18",
                     "enable_features": [
                         "SharingSendViaSync",
                         "SyncDeviceInfoInTransportMode"
@@ -7148,25 +7148,6 @@
             ]
         }
     ],
-    "UnidoUseDeviceInfo": [
-        {
-            "platforms": [
-                "android",
-                "chromeos",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "SharingUseDeviceInfo"
-                    ]
-                }
-            ]
-        }
-    ],
     "UnifiedAutoplay": [
         {
             "platforms": [