Add flag to allow Crostini GPU to be enabled / disabled.

Bug: 892279
Change-Id: Ia595a3eb3b5aa40ff03e64810668c4f903a15928
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1592954
Reviewed-by: Fergus Dall <[email protected]>
Commit-Queue: Ben Wells <[email protected]>
Cr-Commit-Position: refs/heads/master@{#655925}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 78854ed..85878a4 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2387,6 +2387,9 @@
      ENABLE_DISABLE_VALUE_TYPE(
          chromeos::switches::kShowAndroidFilesInFilesApp,
          chromeos::switches::kHideAndroidFilesInFilesApp)},
+    {"crostini-gpu-support", flag_descriptions::kCrostiniGpuSupportName,
+     flag_descriptions::kCrostiniGpuSupportDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(chromeos::features::kCrostiniGpuSupport)},
     {"crostini-usb-allow-unsupported",
      flag_descriptions::kCrostiniUsbAllowUnsupportedName,
      flag_descriptions::kCrostiniUsbAllowUnsupportedDescription, kOsCrOS,