Remove some unused resources.

chrome/browser/ui/views/toolbar/browser_actions_container.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 31 matching lines @@
 // overflow container, however, is allowed to display icons in multiple rows.
 //
 // The main container is placed flush against the omnibox and hot dog menu,
 // whereas the overflow container is placed within the hot dog menu. The
 // layout is similar to this:
 //   rI_I_Is
 // Where the letters are as follows:
 //   r: An invisible resize area.  This is
 //      GetLayoutConstant(TOOLBAR_STANDARD_SPACING) pixels wide and directly
 //      adjacent to the omnibox. Only shown for the main container.
-//   I: An icon. In material design this has a width of 28. Otherwise it is as
-//      wide as the IDR_BROWSER_ACTION image.
+//   I: An icon. This has a width of 28.
 //   _: ToolbarActionsBar::PlatformSettings::item_spacing pixels of empty space.
 //   s: GetLayoutConstant(TOOLBAR_STANDARD_SPACING) pixels of empty space
 //      (before the app menu).
 // The reason the container contains the trailing space "s", rather than having
 // it be handled by the parent view, is so that when the user starts
 // dragging an icon around, we have the space to draw the ultimate drop
 // indicator.  (Otherwise, we'd be trying to draw it into the padding beyond our
 // right edge, and it wouldn't appear.)
 //
 // The BrowserActionsContainer in 'main' mode follows a few rules, in terms of
@@ skipping 216 matching lines @@
   // is none.
   std::unique_ptr<DropPosition> drop_position_;
 
   // The extension bubble that is actively showing, if any.
   views::BubbleDialogDelegateView* active_bubble_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserActionsContainer);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_