Support 3 keyboards:

    - Russian phonetic (YaZHert) keyboard
    - Russian phonetic (AATSEEL) keyboard
    - Maltese keyboard

Also support Irish keyboard as login keyboard.

BUG=173149
TEST=Verified on linux_chromeos.

Review URL: https://codereview.chromium.org/643853002

Cr-Commit-Position: refs/heads/master@{#300272}

chrome/app/chromeos_strings.grdp

@@ -4643,6 +4643,9 @@ Battery full
   <message name="IDS_IME_NAME_KEYBOARD_LITHUANIAN" desc="The input method name shows in system tray menu, this shows [Lithuanian keyboard].">
     Lithuanian keyboard
   </message>
+  <message name="IDS_IME_NAME_KEYBOARD_MALTESE" desc="The input method name shows in system tray menu, this shows [Maltese keyboard].">
+    Maltese keyboard
+  </message>
   <message name="IDS_IME_NAME_KEYBOARD_MONGOLIAN" desc="The input method name shows in system tray menu, this shows [Mongolian keyboard].">
     Mongolian keyboard
   </message>
@@ -4664,6 +4667,12 @@ Battery full
   <message name="IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC" desc="The input method name shows in system tray menu, this shows [Russian Phonetic keyboard].">
     Russian Phonetic keyboard
   </message>
+  <message name="IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC_AATSEEL" desc="The input method name shows in system tray menu, this shows [Russian Phonetic (AATSEEL) keyboard].">
+    Russian Phonetic (AATSEEL) keyboard
+  </message>
+  <message name="IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC_YAZHERT" desc="The input method name shows in system tray menu, this shows [Russian Phonetic (YaZHert) keyboard].">
+    Russian Phonetic (YaZHert) keyboard
+  </message>
   <message name="IDS_IME_NAME_KEYBOARD_SERBIAN" desc="The input method name shows in system tray menu, this shows [Serbian keyboard].">
     Serbian keyboard
   </message>

chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.cc

@@ -153,6 +153,7 @@ const struct InputMethodNameMap {
       {"__MSG_KEYBOARD_LITHUANIAN__", IDS_IME_NAME_KEYBOARD_LITHUANIAN},
       {"__MSG_KEYBOARD_MALAYALAM_PHONETIC__",
        IDS_IME_NAME_KEYBOARD_MALAYALAM_PHONETIC},
+      {"__MSG_KEYBOARD_MALTESE__", IDS_IME_NAME_KEYBOARD_MALTESE},
       {"__MSG_KEYBOARD_MONGOLIAN__", IDS_IME_NAME_KEYBOARD_MONGOLIAN},
       {"__MSG_KEYBOARD_MYANMAR_MYANSAN__",
        IDS_IME_NAME_KEYBOARD_MYANMAR_MYANSAN},
@@ -166,6 +167,10 @@ const struct InputMethodNameMap {
       {"__MSG_KEYBOARD_POLISH__", IDS_IME_NAME_KEYBOARD_POLISH},
       {"__MSG_KEYBOARD_PORTUGUESE__", IDS_IME_NAME_KEYBOARD_PORTUGUESE},
       {"__MSG_KEYBOARD_ROMANIAN__", IDS_IME_NAME_KEYBOARD_ROMANIAN},
+      {"__MSG_KEYBOARD_RUSSIAN_PHONETIC_AATSEEL__",
+       IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC_AATSEEL},
+      {"__MSG_KEYBOARD_RUSSIAN_PHONETIC_YAZHERT__",
+       IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC_YAZHERT},
       {"__MSG_KEYBOARD_RUSSIAN_PHONETIC__",
        IDS_IME_NAME_KEYBOARD_RUSSIAN_PHONETIC},
       {"__MSG_KEYBOARD_RUSSIAN__", IDS_IME_NAME_KEYBOARD_RUSSIAN},

chrome/browser/resources/chromeos/input_method/google_input_tools_manifest.json

@@ -574,6 +574,24 @@
       "language": ["my"],
       "layouts": ["us"],
       "input_view": "inputview.html#id=m17n:my_myansan&language=my&passwordLayout=us&name=keyboard_myanmar_myansan"
+    },
+    {
+      "name": "__MSG_keyboard_russian_phonetic_aatseel__",
+      "type": "ime",
+      "id": "vkd_ru_phone_aatseel",
+      "description": "",
+      "language": ["ru"],
+      "layouts": ["us"],
+      "input_view": "inputview.html#id=m17n:ru_phone_aatseel&language=ru&passwordLayout=us&name=keyboard_russian_phonetic_aatseel"
+    },
+    {
+      "name": "__MSG_keyboard_russian_phonetic_yazhert__",
+      "type": "ime",
+      "id": "vkd_ru_phone_yazhert",
+      "description": "",
+      "language": ["ru"],
+      "layouts": ["us"],
+      "input_view": "inputview.html#id=m17n:ru_phone_yazhert&language=ru&passwordLayout=us&name=keyboard_russian_phonetic_yazhert"
     }
   ],
   "manifest_version": 2

chrome/browser/resources/chromeos/input_method/google_xkb_manifest.json

@@ -633,6 +633,16 @@
       "layouts": ["ie"],
       "input_view": "inputview.html#id=ie.compact.qwerty&language=ga&passwordLayout=ie.compact.qwerty&name=keyboard_irish",
       "options_page": "hmm_options.html?code=xkb:ie::ga"
+    },
+    {
+      "name": "__MSG_keyboard_maltese__",
+      "type": "ime",
+      "id": "xkb:mt::mlt",
+      "description": "",
+      "language": ["mt"],
+      "layouts": ["mt"],
+      "input_view": "inputview.html#id=mt&language=mt&passwordLayout=mt&name=keyboard_maltese",
+      "options_page": "hmm_options.html?code=xkb:mt::mlt"
     }
   ],
   "manifest_version": 2

chromeos/ime/component_extension_ime_manager.cc

@@ -35,12 +35,14 @@ const char* kLoginLayoutWhitelist[] = {
   "gb(extd)",
   "hr",
   "hu",
+  "ie",
   "is",
   "it",
   "jp",
   "latam",
   "lt",
   "lv(apostrophe)",
+  "mt",
   "no",
   "pl",
   "pt",