Linux Aura: Added --use-system-title-bar flag.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 3277cc482ef5c5ec1ca37db113aaa5256edc663f..7d5ee9fcac2927e443fb85f8367c6667d167e42c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14992,6 +14992,15 @@ Do you accept?
       Enable Web MIDI API experimental support.
     </message>
 
+    <message name="IDS_FLAGS_USE_SYSTEM_TITLE_BAR"
+             desc="Name of about:flag option to use the host operating system's title bar and window borders.">
+      Use system title bar and borders
+    </message>
+    <message name="IDS_FLAGS_USE_SYSTEM_TITLE_BAR_DESCRIPTION"
+             desc="Description of about:flag option to turn on the host operating system's title bar and window borders.">
+      Use the host operating system's window title bar and borders, instead of custom window dressing.
+    </message>
+
     <!-- Toast experiment. -->
     <message name="IDS_TRY_TOAST_SET_DEFAULT" desc="Text of the checkbox to make chrome the default browser">
       Make it my default browser