Introduce new flag to control usage of MD in secondary (not top-chrome)

ui/views/window/dialog_client_view.cc

 // Copyright (c) 2012 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.
 
 #include "ui/views/window/dialog_client_view.h"
 
 #include <algorithm>
 
 #include "build/build_config.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/blue_button.h"
 #include "ui/views/controls/button/label_button.h"
+#include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/layout/layout_constants.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/dialog_delegate.h"
 
 namespace views {
 
 namespace {
 
 // The group used by the buttons.  This name is chosen voluntarily big not to
 // conflict with other groups that could be in the dialog content.
@@ skipping 277 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // DialogClientView, private:
 
 LabelButton* DialogClientView::CreateDialogButton(ui::DialogButton type) {
   const base::string16 title = GetDialogDelegate()->GetDialogButtonLabel(type);
   LabelButton* button = NULL;
   if (GetDialogDelegate()->UseNewStyleForThisDialog() &&
       GetDialogDelegate()->GetDefaultDialogButton() == type &&
       GetDialogDelegate()->ShouldDefaultButtonBeBlue()) {
-    button = new BlueButton(this, title);
+    if (ui::MaterialDesignController::IsSecondaryUiMaterial()) {
+      MdTextButton* md_button = MdTextButton::CreateMdButton(this, title);
+      md_button->SetCallToAction(MdTextButton::STRONG_CALL_TO_ACTION);
+      button = md_button;
+    } else {
+      button = new BlueButton(this, title);
+    }
   } else {
-    button = new LabelButton(this, title);
-    button->SetStyle(Button::STYLE_BUTTON);
+    button = MdTextButton::CreateSecondaryUiButton(this, title);
   }
   button->SetFocusBehavior(FocusBehavior::ALWAYS);
 
   const int kDialogMinButtonWidth = 75;
   button->SetMinSize(gfx::Size(kDialogMinButtonWidth, 0));
   button->SetGroup(kButtonGroup);
   return button;
 }
 
 int DialogClientView::GetButtonsAndExtraViewRowHeight() const {
@@ skipping 28 matching lines @@
       std::remove(child_views.begin(), child_views.end(), nullptr),
       child_views.end());
 
   // Setup focus by reordering views. It is not safe to use SetNextFocusableView
   // since child views may be added externally to this view.
   for (size_t i = 0; i < child_views.size(); i++)
     ReorderChildView(child_views[i], i);
 }
 
 }  // namespace views