Remove views::Label::SetDisabledColor(). Replace with typography colors.

ash/accelerators/exit_warning_handler.cc

 // Copyright 2013 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 "ash/accelerators/exit_warning_handler.h"
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
@@ skipping 39 matching lines @@
         rb.GetFontList(ui::ResourceBundle::LargeFont);
     text_width_ = gfx::GetStringWidth(text_, font_list);
     SetPreferredSize(
         gfx::Size(text_width_ + kHorizontalMarginAroundText,
                   font_list.GetHeight() + kVerticalMarginAroundText));
     views::Label* label = new views::Label();
     label->SetText(text_);
     label->SetHorizontalAlignment(gfx::ALIGN_CENTER);
     label->SetFontList(font_list);
     label->SetEnabledColor(kTextColor);
-    label->SetDisabledColor(kTextColor);
     label->SetAutoColorReadabilityEnabled(false);
     label->SetSubpixelRenderingEnabled(false);
     AddChildView(label);
     SetLayoutManager(new views::FillLayout);
   }
 
   void OnPaint(gfx::Canvas* canvas) override {
     cc::PaintFlags flags;
     flags.setStyle(cc::PaintFlags::kFill_Style);
     flags.setColor(kWindowBackgroundColor);
@@ skipping 89 matching lines @@
   widget_->Show();
 
   delegate->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
 }
 
 void ExitWarningHandler::Hide() {
   widget_.reset();
 }
 
 }  // namespace ash