flags: add flags from official bots

TBR=avi@chromium.org

Bug: 906602
Change-Id: Ifb1da0eb3b5ce013a3e64f8ab53e91c0708da6ea
Reviewed-on: https://chromium-review.googlesource.com/c/1341969Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609282}

chrome/browser/flag-metadata.json

@@ -447,6 +447,11 @@
     // "owners": [ "your-team" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "dcheck-is-fatal",
+    // "owners": [ "your-team" ],
+    "expiry_milestone": 76
+  },
   {
     "name": "debug-packed-apps",
     // "owners": [ "your-team" ],
@@ -1207,6 +1212,11 @@
     // "owners": [ "your-team" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "enable-google-branded-context-menu",
+    // "owners": [ "your-team" ],
+    "expiry_milestone": 76
+  },
   {
     "name": "enable-gpu-appcontainer",
     // "owners": [ "your-team" ],
@@ -2482,6 +2492,11 @@
     // "owners": [ "your-team" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "oculus-vr",
+    // "owners": [ "your-team" ],
+    "expiry_milestone": 76
+  },
   {
     "name": "offline-bookmarks",
     // "owners": [ "your-team" ],