mac: Delete unused resources from //ui/resources

Bug: 832676
Change-Id: I2e7c0352514c3ba46b44f17b65dce370b945ac15
Reviewed-on: https://chromium-review.googlesource.com/c/1344995Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610052}

ui/base/cocoa/menu_controller_unittest.mm

@@ -554,7 +554,8 @@ TEST_F(MenuControllerTest, Dynamic) {
   base::string16 second = ASCIIToUTF16("second");
   delegate.SetDynamicLabel(second);
   const gfx::Image& icon =
-      ResourceBundle::GetSharedInstance().GetNativeImageNamed(IDR_THROBBER);
+      ResourceBundle::GetSharedInstance().GetNativeImageNamed(
+          IDR_EMOJI_FAVICON);
   delegate.SetDynamicIcon(icon);
   // Simulate opening the menu and validate that the item label + icon changes.
   Validate(menu.get(), [menu menu]);

ui/resources/ui_resources.grd

@@ -111,13 +111,6 @@
       <structure type="chrome_scaled_image" name="IDR_EMOJI_FAVICON" file="common/emoji_menu_item.png" />
       <structure type="chrome_scaled_image" name="IDR_FOLDER_CLOSED" file="common/folder_closed.png" />
       <structure type="chrome_scaled_image" name="IDR_FOLDER_CLOSED_RTL" file="common/folder_closed_rtl.png" />
-      <if expr="is_macosx">
-        <structure type="chrome_scaled_image" name="IDR_MENU_OVERFLOW_UP" file="common/menu_overflow_up.png" />
-        <structure type="chrome_scaled_image" name="IDR_MENU_OVERFLOW_DOWN" file="common/menu_overflow_down.png" />
-      </if>
-      <if expr="is_macosx or is_ios">
-        <structure type="chrome_scaled_image" name="IDR_MENU_HIERARCHY_ARROW" file="mac/menu_hierarchy_arrow.png" />
-      </if>
       <if expr="toolkit_views and not is_macosx">
         <structure type="chrome_scaled_image" name="IDR_NOTIFICATION_SETTINGS" file="common/notification_settings.png"/>
       </if>
@@ -146,9 +139,6 @@
         <structure type="chrome_scaled_image" name="IDR_TEXT_SELECTION_HANDLE_LEFT" file="common/text_selection_handle_left.png" />
         <structure type="chrome_scaled_image" name="IDR_TEXT_SELECTION_HANDLE_RIGHT" file="common/text_selection_handle_right.png" />
       </if>
-      <if expr="is_macosx">
-        <structure type="chrome_scaled_image" name="IDR_THROBBER" file="legacy/throbber.png" />
-      </if>
       <if expr="toolkit_views">
         <structure type="chrome_scaled_image" name="IDR_TOUCH_DRAG_TIP_COPY" file="common/drag_tip_copy.png" />
         <structure type="chrome_scaled_image" name="IDR_TOUCH_DRAG_TIP_MOVE" file="common/drag_tip_move.png" />