Vectorize the remaining material design shelf icons

ash/shelf/overflow_button.cc

Index: ash/shelf/overflow_button.cc
diff --git a/ash/shelf/overflow_button.cc b/ash/shelf/overflow_button.cc
index 3602ae1fcf76deaad4fdf8df504482f4b4135549..678dbcf855bfc3dc61ed99dbe159d2e47b12b022 100644
--- a/ash/shelf/overflow_button.cc
+++ b/ash/shelf/overflow_button.cc
@@ -4,6 +4,7 @@
 
 #include "ash/shelf/overflow_button.h"
 
+#include "ash/ash_constants.h"
 #include "ash/ash_switches.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ -19,9 +20,11 @@
 #include "ui/gfx/animation/throb_animation.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia_operations.h"
+#include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/skbitmap_operations.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/gfx/transform.h"
+#include "ui/gfx/vector_icons_public.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
@@ -29,7 +32,11 @@ namespace ash {
 OverflowButton::OverflowButton(views::ButtonListener* listener, Shelf* shelf)
     : CustomButton(listener), bottom_image_(nullptr), shelf_(shelf) {
   ui::ResourceBundle* rb = &ui::ResourceBundle::GetSharedInstance();
-  bottom_image_ = rb->GetImageNamed(IDR_ASH_SHELF_OVERFLOW).ToImageSkia();
+  bottom_image_md_ =

[James Cook, 2016/06/09 19:24:48]

I would only load the icon when MD is enabled.

[tdanderson, 2016/06/09 22:36:33]

Done.

+      CreateVectorIcon(gfx::VectorIconId::SHELF_OVERFLOW, kShelfIconColor);
+  bottom_image_ = MaterialDesignController::IsShelfMaterial()
+                      ? &bottom_image_md_
+                      : rb->GetImageNamed(IDR_ASH_SHELF_OVERFLOW).ToImageSkia();
 
   SetFocusBehavior(FocusBehavior::ACCESSIBLE_ONLY);
   SetAccessibleName(l10n_util::GetStringUTF16(IDS_ASH_SHELF_OVERFLOW_NAME));