fix: force software gl backend for snap (microsoft#214549)

* fix: force software gl backend for snap

Refs microsoft#212494

When using the default ANGLE gl/gles backend, v1.90 attempts
to get display refresh rate for vsync from an internal implementation
instead of using the gl extension EGL_CHROMIUM_sync_control,
this eventually ends up loading display info from XRandr and chromium
attempts to set a label for the data from the shipped resource pak
file that is not accessible to the gpu process triggering a SIGTRAP
in ui::ResourceBundle::GetSharedInstance.

* fix: snap packaging for argument parsing (microsoft#214560)

* chore: add use-gl and use-angle to known chromium flags

Author: deepak1556

resources/linux/snap/electron-launch

@@ -261,4 +261,4 @@ fi
 
 wait_for_async_execs
 
-exec "$@"
+exec "$@" "--no-sandbox" "--use-gl=angle" "--use-angle=swiftshader"

resources/linux/snap/snapcraft.yaml

@@ -74,8 +74,8 @@ parts:
 
 apps:
   @@NAME@@:
-    command: electron-launch $SNAP/usr/share/@@NAME@@/bin/@@NAME@@ --no-sandbox
+    command: electron-launch $SNAP/usr/share/@@NAME@@/bin/@@NAME@@
     common-id: @@NAME@@.desktop
 
   url-handler:
-    command: electron-launch $SNAP/usr/share/@@NAME@@/bin/@@NAME@@ --open-url --no-sandbox
+    command: electron-launch $SNAP/usr/share/@@NAME@@/bin/@@NAME@@ --open-url

src/vs/platform/environment/common/argv.ts

@@ -145,4 +145,6 @@ export interface NativeParsedArgs {
 	'trace-startup-format'?: string;
 	'trace-startup-file'?: string;
 	'trace-startup-duration'?: string;
+	'use-gl'?: string;
+	'use-angle'?: string;
 }

src/vs/platform/environment/node/argv.ts

@@ -209,6 +209,8 @@ export const OPTIONS: OptionDescriptions<Required<NativeParsedArgs>> = {
 	'trace-startup-format': { type: 'string' },
 	'trace-startup-file': { type: 'string' },
 	'trace-startup-duration': { type: 'string' },
+	'use-gl': { type: 'string' },
+	'use-angle': { type: 'string' },
 
 	_: { type: 'string[]' } // main arguments
 };