Add an option in language settings for activating the IME menu.

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index cd299f293ab237a37605eeae3782dff46c8e21bf..53a320e7c7c66fbb174c1c1c5e634e3b8b28bb16 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -3550,6 +3550,14 @@ Press any key to continue exploring.
            desc="The label for languages with no Input Methods">
     This language doesn't have any input methods
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_ACTIVATE_IME_MENU"
+           desc="The label for activating IME menu on shelf.">
+    Show the input method menu on shelf.

[stevenjb, 2016/01/04 17:58:10]

s/on shelf/on the shelf/

[Azure Wei, 2016/01/05 06:48:03]

Done.

+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_ACTIVATE_IME_MENU_DESCRIPTION"
+           desc="The label for the description of showing input method menu.">
+    for easier switch of input methods, and access to more input features: voice input, handwriting and emoji.

[stevenjb, 2016/01/04 17:58:10]

s/for/For/
s/switch/switching/
s/, and/and/

[Azure Wei, 2016/01/05 06:48:03]

Done.

+  </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_THIRD_PARTY_WARNING_TITLE"
            desc="The title showing in the warning dialog when enabling a 3rd party Input Method">
     Third party input method