Implement MD simple gesture nav

ui/resources/vector_icons/BUILD.gn

Index: ui/resources/vector_icons/BUILD.gn
diff --git a/ui/resources/vector_icons/BUILD.gn b/ui/resources/vector_icons/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..d730a7f1c878b9d93d5f4e4d7eaf925947bd7291
--- /dev/null
+++ b/ui/resources/vector_icons/BUILD.gn
@@ -0,0 +1,27 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//ui/vector_icons/vector_icons.gni")
+
+aggregate_vector_icons("ui_resources_vector_icons") {

[Evan Stade, 2017/02/08 00:00:24]

I just added a target for this --- ui/vector_icons/BUILD.gn

[mohsen, 2017/02/08 03:54:56]

Switched to that target...

+  icon_directory = "."
+
+  icons = [
+    "navigate_back.1x.icon",

[Evan Stade, 2017/02/08 00:00:24]

seems these are no longer used exclusively for navigation. Maybe back_arrow or
go_back now makes more sense?

[mohsen, 2017/02/08 03:54:56]

Sure. Done.

+    "navigate_back.icon",
+    "navigate_forward.1x.icon",
+    "navigate_forward.icon",
+  ]
+}
+
+source_set("vector_icons") {
+  sources = get_target_outputs(":ui_resources_vector_icons")
+  sources += [ "//ui/gfx/vector_icon_types.h" ]
+
+  deps = [
+    ":ui_resources_vector_icons",
+    "//base",
+    "//skia",
+  ]
+}