ToolbarView MaterialDesign in ThemeProvider

ui/base/resource/material_design/material_design_controller.h

 // Copyright 2015 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 UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
 #define UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_
 
 #include "base/macros.h"
 #include "ui/base/ui_base_export.h"
 
 namespace ui {
 
 namespace test {
 class MaterialDesignControllerTestAPI;
 }  // namespace test
 
 // Central controller to handle material design modes.
 class UI_BASE_EXPORT MaterialDesignController {
  public:
-  // The different material design modes.
+  // The different material design modes. The order cannot be changed without
+  // updating references as these are used as array indices.
   enum class Mode {
+    // Classic, non-material design.
+    NON_MATERIAL = 0,
     // Basic material design.
-    MATERIAL,
+    MATERIAL = 1,
     // Material design targeted at mouse/touch hybrid devices.
-    MATERIAL_HYBRID,
-    // Classic, non-material design.
-    NON_MATERIAL
+    MATERIAL_HYBRID = 2
   };
 
   // Get the current Mode that should be used by the system.
   static Mode GetMode();
 
  private:
   friend class test::MaterialDesignControllerTestAPI;
 
   // Tracks whether |mode_| has been initialized. This is necessary so tests can
   // reset the state back to a clean state during tear down.
@@ skipping 16 matching lines @@
   // Set |mode_| to |mode| and updates |is_mode_initialized_| to true. Can be
   // used by tests to directly set the mode.
   static void SetMode(Mode mode);
 
   DISALLOW_COPY_AND_ASSIGN(MaterialDesignController);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_RESOURCE_MATERIAL_DESIGN_MATERIAL_DESIGN_CONTROLLER_H_