cocoa browser: remove non-MD location bar support

chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm

Index: chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm b/chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm
index 9c691276217aea74f1ef9e09a1ad32b5b0ef7154..992baaeb3cd70d22d8c2218d850c2d6cd9ad396a 100644
--- a/chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm
+++ b/chrome/browser/ui/cocoa/location_bar/zoom_decoration.mm
@@ -93,29 +93,17 @@
 void ZoomDecoration::ShowAndUpdateUI(zoom::ZoomController* zoom_controller,
                                      NSString* tooltip_string,
                                      bool location_bar_is_dark) {
-  if (ui::MaterialDesignController::IsModeMaterial()) {
-    vector_icon_id_ = gfx::VectorIconId::VECTOR_ICON_NONE;
-    zoom::ZoomController::RelativeZoom relative_zoom =
-        zoom_controller->GetZoomRelativeToDefault();
-    if (relative_zoom == zoom::ZoomController::ZOOM_BELOW_DEFAULT_ZOOM) {
-      vector_icon_id_ = gfx::VectorIconId::ZOOM_MINUS;
-    } else if (relative_zoom == zoom::ZoomController::ZOOM_ABOVE_DEFAULT_ZOOM) {
-      vector_icon_id_ = gfx::VectorIconId::ZOOM_PLUS;
-    }
-
-    SetImage(GetMaterialIcon(location_bar_is_dark));
-  } else {
-    int image_id = IDR_ZOOM_NORMAL;
-    zoom::ZoomController::RelativeZoom relative_zoom =
-        zoom_controller->GetZoomRelativeToDefault();
-    if (relative_zoom == zoom::ZoomController::ZOOM_BELOW_DEFAULT_ZOOM)
-      image_id = IDR_ZOOM_MINUS;
-    else if (relative_zoom == zoom::ZoomController::ZOOM_ABOVE_DEFAULT_ZOOM)
-      image_id = IDR_ZOOM_PLUS;
-
-    SetImage(OmniboxViewMac::ImageForResource(image_id));
+  vector_icon_id_ = gfx::VectorIconId::VECTOR_ICON_NONE;
+  zoom::ZoomController::RelativeZoom relative_zoom =
+      zoom_controller->GetZoomRelativeToDefault();
+  if (relative_zoom == zoom::ZoomController::ZOOM_BELOW_DEFAULT_ZOOM) {
+    vector_icon_id_ = gfx::VectorIconId::ZOOM_MINUS;
+  } else if (relative_zoom == zoom::ZoomController::ZOOM_ABOVE_DEFAULT_ZOOM) {
+    vector_icon_id_ = gfx::VectorIconId::ZOOM_PLUS;
   }
 
+  SetImage(GetMaterialIcon(location_bar_is_dark));
+
   tooltip_.reset([tooltip_string retain]);
 
   SetVisible(true);