Add IME UI related extension API.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 89292774b858121875ac5944fffcb13d70f7a9dc..83fd7b66a3d258fd33467e5a4e16b631147108a9 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -919,6 +919,8 @@
         'browser/extensions/extension_idle_api.h',
         'browser/extensions/extension_idle_api_constants.cc',
         'browser/extensions/extension_idle_api_constants.h',
+        'browser/extensions/extension_ime_ui_api.cc',
+        'browser/extensions/extension_ime_ui_api.h',
         'browser/extensions/extension_info_map.cc',
         'browser/extensions/extension_info_map.h',
         'browser/extensions/extension_info_private_api_chromeos.cc',
@@ -3410,6 +3412,8 @@
         ['chromeos==0', {
           'sources/': [
             ['exclude', '^browser/chromeos'],
+            ['exclude', '^browser/extensions/extension_ime_ui_api.cc'],
+            ['exclude', '^browser/extensions/extension_ime_ui_api.h'],
             ['exclude', '^browser/ui/webui/chromeos'],
             ['exclude', '^browser/ui/webui/options/chromeos'],
             ['exclude', 'browser/extensions/extension_tts_api_chromeos.cc'],
@@ -3461,6 +3465,8 @@
           'sources/': [
             ['exclude', '^browser/chromeos/frame/dom_*'],
             ['exclude', '^browser/chromeos/login/dom_*'],
+            ['exclude', '^browser/extensions/extension_ime_ui_api.cc'],
+            ['exclude', '^browser/extensions/extension_ime_ui_api.h'],
             ['exclude', '^browser/webui/keyboard_ui.*'],
             ['exclude', '^browser/renderer_host/render_widget_host_view_views.*'],
             ['exclude', '^browser/ui/touch/*'],