Rename KEY_ constants to avoid conflict with <linux/input.h>

ui/events/ozone/layout/keyboard_layout_engine_unittest.cc

Index: ui/events/ozone/layout/keyboard_layout_engine_unittest.cc
diff --git a/ui/events/ozone/layout/keyboard_layout_engine_unittest.cc b/ui/events/ozone/layout/keyboard_layout_engine_unittest.cc
index 2ae211c462ea28036cff6276f1064919a13b508e..b897550d59031aa6fb6b8b4b6741ae806105c456 100644
--- a/ui/events/ozone/layout/keyboard_layout_engine_unittest.cc
+++ b/ui/events/ozone/layout/keyboard_layout_engine_unittest.cc
@@ -185,10 +185,10 @@ void TestLookup(const char* name, KeyboardLayoutEngine* engine) {
     KeyboardCode output_keycode;
     base::char16 output_character;
   } kTestCases[] = {
-      {DomCode::KEY_A, EF_NONE, DomKey::Constant<'a'>::Character, VKEY_A, 'a'},
-      {DomCode::KEY_A, EF_SHIFT_DOWN, DomKey::Constant<'A'>::Character, VKEY_A,
+      {DomCode::US_A, EF_NONE, DomKey::Constant<'a'>::Character, VKEY_A, 'a'},
+      {DomCode::US_A, EF_SHIFT_DOWN, DomKey::Constant<'A'>::Character, VKEY_A,
        'A'},
-      {DomCode::KEY_A, EF_CONTROL_DOWN, DomKey::Constant<'a'>::Character,
+      {DomCode::US_A, EF_CONTROL_DOWN, DomKey::Constant<'a'>::Character,
        VKEY_A, 1},
   };