Modify toolbar action bar layout for material design

chrome/browser/ui/toolbar/toolbar_actions_bar.h

 // Copyright 2014 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_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_
 #define CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 30 matching lines @@
 //
 // This can come in two flavors, main and "overflow". The main bar is visible
 // next to the omnibox, and the overflow bar is visible inside the chrome
 // app menu. The main bar can have only a single row of icons with flexible
 // width, whereas the overflow bar has multiple rows of icons with a fixed
 // width (the width of the menu).
 class ToolbarActionsBar : public ToolbarActionsModel::Observer {
  public:
   // A struct to contain the platform settings.
   struct PlatformSettings {
-    explicit PlatformSettings(bool in_overflow_mode);
+    PlatformSettings();
 
-    // The padding that comes before the first icon in the container.
-    int left_padding;
-    // The padding following the final icon in the container.
-    int right_padding;
-    // The spacing between each of the icons.
+    // The spacing between each of the icons, between the start of the
+    // container and the first item, and between the last item and end of
+    // the container.
     int item_spacing;
     // The number of icons per row in the overflow menu.
     int icons_per_overflow_menu_row;
     // Whether or not the overflow menu is displayed as a chevron (this is being
     // phased out).
     bool chevron_enabled;
   };
 
   // The type of drag that occurred in a drag-and-drop operation.
   enum DragType {
@@ skipping 263 matching lines @@
       pending_extension_bubble_controller_;
 
   base::ObserverList<ToolbarActionsBarObserver> observers_;
 
   base::WeakPtrFactory<ToolbarActionsBar> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsBar);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_BAR_H_