[ash-md] Erases the pre-MD code path for Overview Mode

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
index 45e73d9630f9224559fd5f2573ee5cc4bff86d21..50430a1aa5d76f5dd80e9c5ed20c9f04e1330fcf 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
@@ -11,7 +11,6 @@
 #include "ash/common/frame/default_header_painter.h"
 #include "ash/common/frame/frame_border_hit_test.h"
 #include "ash/common/frame/header_painter_util.h"
-#include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/wm_lookup.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
@@ -376,13 +375,11 @@ void BrowserNonClientFrameViewAsh::ChildPreferredSizeChanged(
 void BrowserNonClientFrameViewAsh::OnOverviewModeStarting() {
   frame()->GetNativeWindow()->SetProperty(aura::client::kTopViewColor,
                                           GetFrameColor());
-  if (ash::MaterialDesignController::IsOverviewMaterial())
-    caption_button_container_->SetVisible(false);
+  caption_button_container_->SetVisible(false);
 }
 
 void BrowserNonClientFrameViewAsh::OnOverviewModeEnded() {
-  if (ash::MaterialDesignController::IsOverviewMaterial())
-    caption_button_container_->SetVisible(true);
+  caption_button_container_->SetVisible(true);
 }
 
 void BrowserNonClientFrameViewAsh::OnMaximizeModeStarted() {