Makes MaterialDesignController initialization explicit

ui/base/material_design/material_design_controller.h

Index: ui/base/material_design/material_design_controller.h
diff --git a/ui/base/material_design/material_design_controller.h b/ui/base/material_design/material_design_controller.h
index 9ef61c0c4e546250afeb927a3f1c9a4c39c5673c..e105044b628ce36086f7abab977598072229304d 100644
--- a/ui/base/material_design/material_design_controller.h
+++ b/ui/base/material_design/material_design_controller.h
@@ -28,6 +28,9 @@ class UI_BASE_EXPORT MaterialDesignController {
     MATERIAL_HYBRID = 2
   };
 
+  // Initializes |mode_|. Must be called before checking |mode_|.
+  static void Initialize();
+
   // Get the current Mode that should be used by the system.
   static Mode GetMode();
 
@@ -51,9 +54,6 @@ class UI_BASE_EXPORT MaterialDesignController {
   MaterialDesignController();
   ~MaterialDesignController();
 
-  // Initializes |mode_|.
-  static void InitializeMode();
-
   // Resets the Mode state to uninitialized. To be used by tests to cleanup
   // global state.
   static void UninitializeMode();