Vectorize omnibox dropdown icons

ui/gfx/BUILD.gn

Index: ui/gfx/BUILD.gn
diff --git a/ui/gfx/BUILD.gn b/ui/gfx/BUILD.gn
index a35c384c1d03b858b935201e374cf890f668c4bf..a93dae30070c7e7963d3b8170a3660c390e8d06c 100644
--- a/ui/gfx/BUILD.gn
+++ b/ui/gfx/BUILD.gn
@@ -455,6 +455,7 @@ action("aggregate_vector_icons") {
     "vector_icons/fullscreen.icon",
     "vector_icons/globe.icon",
     "vector_icons/help_outline.icon",
+    "vector_icons/history.icon",

[Peter Kasting, 2015/10/20 01:02:59]

Will we be using this in non-omnibox contexts later?  If not we should probably
name it omnibox_history anyway to reflect its usage in this codebase; reading
the code as-is, it implies the omnibox is stealing and reusing some random
history icon from elsewhere in Chrome or something.

[Evan Stade, 2015/10/20 01:12:09]

yes, BackForwardMenuModel should use it. And on osx,
browser/ui/cocoa/history_menu_bridge.mm. And if we could figure out a way to use
vector icons for favicons, chrome://history would use it too.

     "vector_icons/image.icon",
     "vector_icons/laptop.icon",
     "vector_icons/location_on.icon",
@@ -473,6 +474,11 @@ action("aggregate_vector_icons") {
     "vector_icons/navigate_stop.1x.icon",
     "vector_icons/navigate_stop.icon",
     "vector_icons/notifications.icon",
+    "vector_icons/omnibox_extension_app.1x.icon",
+    "vector_icons/omnibox_extension_app.icon",
+    "vector_icons/omnibox_http.icon",
+    "vector_icons/omnibox_star.1x.icon",
+    "vector_icons/omnibox_star.icon",
     "vector_icons/overflow_chevron.1x.icon",
     "vector_icons/overflow_chevron.icon",
     "vector_icons/paintbrush.icon",