[OriginChip] Enable the origin chip chrome:flags on Linux.

BUG=

Review URL: https://codereview.chromium.org/251853003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266573 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/about_flags.cc

@@ -1630,14 +1630,14 @@ const Experiment kExperiments[] = {
     "origin-chip",
     IDS_FLAGS_ORIGIN_CHIP_NAME,
     IDS_FLAGS_ORIGIN_CHIP_DESCRIPTION,
-    kOsCrOS | kOsWin,
+    kOsCrOS | kOsWin | kOsLinux,
     MULTI_VALUE_TYPE(kOriginChipChoices)
   },
   {
     "origin-chip-in-omnibox",
     IDS_FLAGS_ORIGIN_CHIP_V2_NAME,
     IDS_FLAGS_ORIGIN_CHIP_V2_DESCRIPTION,
-    kOsCrOS | kOsMac | kOsWin,
+    kOsCrOS | kOsMac | kOsWin | kOsLinux,
     MULTI_VALUE_TYPE(kOriginChipV2Choices)
   },
   {