Add VectorIconButton functionality to ImageButton.

ui/views/BUILD.gn

Index: ui/views/BUILD.gn
diff --git a/ui/views/BUILD.gn b/ui/views/BUILD.gn
index 4729d3607aff24bb9d901620bd5f86ec875ea996..82c949cc4ace38019e7efd40accccbc4e80cd13d 100644
--- a/ui/views/BUILD.gn
+++ b/ui/views/BUILD.gn
@@ -132,6 +132,8 @@ component("views") {
     "controls/button/custom_button.h",
     "controls/button/image_button.cc",
     "controls/button/image_button.h",
+    "controls/button/image_button_factory.cc",
+    "controls/button/image_button_factory.h",
     "controls/button/label_button.cc",
     "controls/button/label_button.h",
     "controls/button/label_button_border.cc",
@@ -145,10 +147,6 @@ component("views") {
     "controls/button/radio_button.h",
     "controls/button/toggle_button.cc",
     "controls/button/toggle_button.h",
-    "controls/button/vector_icon_button.cc",
-    "controls/button/vector_icon_button.h",
-    "controls/button/vector_icon_button_delegate.cc",
-    "controls/button/vector_icon_button_delegate.h",
     "controls/combobox/combobox.cc",
     "controls/combobox/combobox.h",
     "controls/combobox/combobox_listener.h",
@@ -852,6 +850,7 @@ source_set("views_unittests_sources") {
     "cocoa/drag_drop_client_mac_unittest.mm",
     "controls/button/blue_button_unittest.cc",
     "controls/button/custom_button_unittest.cc",
+    "controls/button/image_button_factory_unittest.cc",
     "controls/button/image_button_unittest.cc",
     "controls/button/label_button_unittest.cc",
     "controls/button/menu_button_unittest.cc",
@@ -936,6 +935,7 @@ source_set("views_unittests_sources") {
     "//ui/resources",
     "//ui/resources:ui_test_pak",
     "//ui/strings",
+    "//ui/vector_icons",
     "//url",
   ]