Make Win10AcceleratedDefaultBrowserFlow enabled by default

This feature has been rolled-out for a while now and it's ready to
make it default.

Bug: 798612
Change-Id: Ib913bd62b6063c5a4d6986fd6125720c35b572a7
Reviewed-on: https://chromium-review.googlesource.com/c/1337438
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609035}

chrome/common/chrome_features.cc

@@ -678,7 +678,7 @@ const base::Feature kWebRtcRemoteEventLogGzipped{
 #if defined(OS_WIN)
 // Enables the accelerated default browser flow for Windows 10.
 const base::Feature kWin10AcceleratedDefaultBrowserFlow{
-    "Win10AcceleratedDefaultBrowserFlow", base::FEATURE_DISABLED_BY_DEFAULT};
+    "Win10AcceleratedDefaultBrowserFlow", base::FEATURE_ENABLED_BY_DEFAULT};
 #endif  // defined(OS_WIN)
 
 #if defined(OS_ANDROID)

testing/variations/fieldtrial_testing_config.json

@@ -5695,21 +5695,6 @@
             ]
         }
     ],
-    "Win10AcceleratedDefaultBrowserFlow": [
-        {
-            "platforms": [
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "Win10AcceleratedDefaultBrowserFlow"
-                    ]
-                }
-            ]
-        }
-    ],
     "WinOOPSelectFileDialog": [
         {
             "platforms": [