Add DisablePush2 to fieldtrial_testing_config.json.

Generated by
:fieldtrial_testing_config_entry --group_name=DisablePush2 --channel=stable

Change-Id: Id16ca16dc9b18bef3a089771cb567fbfb70400dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2535802
Auto-Submit: Bence Béky <bnc@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Bence Béky <bnc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827909}

testing/variations/fieldtrial_testing_config.json

@@ -3141,6 +3141,24 @@
             ]
         }
     ],
+    "HTTP2": [
+        {
+            "platforms": [
+                "android",
+                "android_webview",
+                "chromeos",
+                "ios",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "DisablePush2"
+                }
+            ]
+        }
+    ],
     "HappinessTrackingSurveysForDesktopSettings": [
         {
             "platforms": [