A workaround to close currently opened menu. Send escape key if screen locker fails to grab input.

build/linux/system.gyp

Index: build/linux/system.gyp
diff --git a/build/linux/system.gyp b/build/linux/system.gyp
index 59cf4863cdade1f4febf898d5af7257a30748645..9952dcc28be3965d6b9352013830b0ecf3210df6 100644
--- a/build/linux/system.gyp
+++ b/build/linux/system.gyp
@@ -266,6 +266,26 @@
       }]]
     },
     {
+      'target_name': 'xtst',
+      'type': 'settings',
+      'conditions': [
+        ['_toolset=="target"', {
+          'direct_dependent_settings': {
+            'cflags': [
+              '<!@(<(pkg-config) --cflags xtst)',
+            ],
+          },
+          'link_settings': {
+            'ldflags': [
+              '<!@(<(pkg-config) --libs-only-L --libs-only-other xtst)',
+            ],
+            'libraries': [
+              '<!@(<(pkg-config) --libs-only-l xtst)',
+            ],
+          },
+      }]]
+    },
+    {
       'target_name': 'selinux',
       'type': 'settings',
       'conditions': [