Adds emoji/handwriting/vocie buttons on opt-in IME menu.

ui/gfx/vector_icons/BUILD.gn

Index: ui/gfx/vector_icons/BUILD.gn
diff --git a/ui/gfx/vector_icons/BUILD.gn b/ui/gfx/vector_icons/BUILD.gn
index 9efc0bdd424f25f5ccb9d4662cb3609ef2e95353..cf4e97ae8002601cdb876b41485b902c224bc206 100644
--- a/ui/gfx/vector_icons/BUILD.gn
+++ b/ui/gfx/vector_icons/BUILD.gn
@@ -35,6 +35,8 @@ action("aggregate_vector_icons") {
     "credit_card.1x.icon",
     "credit_card.icon",
     "default_favicon.icon",
+    "emoticon.1x.icon",

[tdanderson, 2016/09/19 15:44:34]

Since these are being used specifically for Ash, so all six of these new icons
should instead live in ash/resources/vector_icons (this is a somewhat recent
change, and I have updated the documentation to explain:
https://www.chromium.org/developers/how-tos/vectorized-icons-in-native-chrome-ui)

Also please name these system_menu_emoticon (or ime_menu_emoticon if you wish)
to stay consistent with the other icons that are on a 20x20 pixel grid.

[Azure Wei, 2016/09/20 01:05:45]

Done. Thanks for the doc.

+    "emoticon.icon",
     "eol.icon",
     "error_circle.icon",
     "extension.icon",
@@ -82,6 +84,8 @@ action("aggregate_vector_icons") {
     "menu_check.icon",
     "menu_radio_empty.icon",
     "menu_radio_selected.icon",
+    "microphone.1x.icon",
+    "microphone.icon",
     "midi.icon",
     "mixed_content.icon",
     "mode_edit.icon",
@@ -202,6 +206,8 @@ action("aggregate_vector_icons") {
     "window_control_restore.icon",
     "window_control_right_snapped.1x.icon",
     "window_control_right_snapped.icon",
+    "write.1x.icon",
+    "write.icon",
     "zoom_minus.icon",
     "zoom_plus.icon",
   ]