ozone: xkb: Load keymaps on worker thread & cache them

ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc

Index: ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc
diff --git a/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc b/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc
index 5af74e1373df64d10b71d6b8a96eea04254a8f6c..0ae34b6151d95e891416a6bc3f15c2d21217de49 100644
--- a/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc
+++ b/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc
@@ -39,6 +39,12 @@ class VkTestXkbKeyboardLayoutEngine : public XkbKeyboardLayoutEngine {
     ui::KeyboardCode key_code;
   };
 
+  struct RuleNames {
+    std::string layout_name;
+    std::string layout;
+    std::string variant;
+  };
+
  public:
   VkTestXkbKeyboardLayoutEngine(const XkbKeyCodeConverter& keycode_converter)
       : XkbKeyboardLayoutEngine(keycode_converter), entry_(nullptr) {
@@ -743,4 +749,69 @@ TEST_F(XkbLayoutEngineVkTest, KeyboardCodeForPrintable) {
   }
 }
 
+TEST_F(XkbLayoutEngineVkTest, XkbRuleNamesForLayoutName) {
+  static const VkTestXkbKeyboardLayoutEngine::RuleNames kVkeyTestCase[] = {
+      /* 0 */ {"us", "us", ""},
+      /* 1 */ {"jp", "jp", ""},
+      /* 2 */ {"us(intl)", "us", "intl"},
+      /* 3 */ {"us(altgr-intl)", "us", "altgr-intl"},
+      /* 4 */ {"us(dvorak)", "us", "dvorak"},
+      /* 5 */ {"us(colemak)", "us", "colemak"},
+      /* 6 */ {"be", "be", ""},
+      /* 7 */ {"fr", "fr", ""},
+      /* 8 */ {"ca", "ca", ""},
+      /* 9 */ {"ch(fr)", "ch", "fr"},
+      /* 10 */ {"ca(multix)", "ca", "multix"},
+      /* 11 */ {"de", "de", ""},
+      /* 12 */ {"de(neo)", "de", "neo"},
+      /* 13 */ {"ch", "ch", ""},
+      /* 14 */ {"ru", "ru", ""},
+      /* 15 */ {"ru(phonetic)", "ru", "phonetic"},
+      /* 16 */ {"br", "br", ""},
+      /* 17 */ {"bg", "bg", ""},
+      /* 18 */ {"bg(phonetic)", "bg", "phonetic"},
+      /* 19 */ {"ca(eng)", "ca", "eng"},
+      /* 20 */ {"cz", "cz", ""},
+      /* 21 */ {"cz(qwerty)", "cz", "qwerty"},
+      /* 22 */ {"ee", "ee", ""},
+      /* 23 */ {"es", "es", ""},
+      /* 24 */ {"es(cat)", "es", "cat"},
+      /* 25 */ {"dk", "dk", ""},
+      /* 26 */ {"gr", "gr", ""},
+      /* 27 */ {"il", "il", ""},
+      /* 28 */ {"latam", "latam", ""},
+      /* 29 */ {"lt", "lt", ""},
+      /* 30 */ {"lv(apostrophe)", "lv", "apostrophe"},
+      /* 31 */ {"hr", "hr", ""},
+      /* 32 */ {"gb(extd)", "gb", "extd"},
+      /* 33 */ {"gb(dvorak)", "gb", "dvorak"},
+      /* 34 */ {"fi", "fi", ""},
+      /* 35 */ {"hu", "hu", ""},
+      /* 36 */ {"it", "it", ""},
+      /* 37 */ {"is", "is", ""},
+      /* 38 */ {"no", "no", ""},
+      /* 39 */ {"pl", "pl", ""},
+      /* 40 */ {"pt", "pt", ""},
+      /* 41 */ {"ro", "ro", ""},
+      /* 42 */ {"se", "se", ""},
+      /* 43 */ {"sk", "sk", ""},
+      /* 44 */ {"si", "si", ""},
+      /* 45 */ {"rs", "rs", ""},
+      /* 46 */ {"tr", "tr", ""},
+      /* 47 */ {"ua", "ua", ""},
+      /* 48 */ {"by", "by", ""},
+      /* 49 */ {"am", "am", ""},
+      /* 50 */ {"ge", "ge", ""},
+      /* 51 */ {"mn", "mn", ""},
+      /* 52 */ {"ie", "ie", ""}};
+  for (size_t i = 0; i < arraysize(kVkeyTestCase); ++i) {
+    SCOPED_TRACE(i);
+    const VkTestXkbKeyboardLayoutEngine::RuleNames* e = &kVkeyTestCase[i];
+    scoped_ptr<xkb_rule_names> names =
+        layout_engine_->GetXkbRuleNames(e->layout_name);
+    EXPECT_EQ(names.get()->layout, e->layout);
+    EXPECT_EQ(names.get()->variant, e->variant);
+  }
+}
+
 }  // namespace ui