[Ash] Always show minimize button.

ash/frame/caption_buttons/frame_size_button_unittest.cc

 // Copyright 2014 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/frame/caption_buttons/frame_size_button.h"
 
 #include "ash/frame/caption_buttons/frame_caption_button.h"
 #include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 42 matching lines @@
     // Right align the caption button container.
     gfx::Size preferred_size = caption_button_container_->GetPreferredSize();
     caption_button_container_->SetBounds(width() - preferred_size.width(), 0,
         preferred_size.width(), preferred_size.height());
   }
 
   virtual void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) OVERRIDE {
     if (details.is_add && details.child == this) {
       caption_button_container_ = new FrameCaptionButtonContainerView(
-          GetWidget(), FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
+          GetWidget());
 
       // Set arbitrary images for the container's buttons so that the buttons
       // have non-empty sizes.
       for (int icon = 0; icon < CAPTION_BUTTON_ICON_COUNT; ++icon) {
         caption_button_container_->SetButtonImages(
             static_cast<CaptionButtonIcon>(icon),
             IDR_AURA_WINDOW_CONTROL_ICON_CLOSE,
             IDR_AURA_WINDOW_CONTROL_ICON_CLOSE_I,
             IDR_AURA_WINDOW_CONTROL_BACKGROUND_H,
             IDR_AURA_WINDOW_CONTROL_BACKGROUND_P);
@@ skipping 389 matching lines @@
 
   // None of the buttons should stay pressed and the buttons should have their
   // regular icons.
   EXPECT_TRUE(AllButtonsInNormalState());
   EXPECT_EQ(CAPTION_BUTTON_ICON_MINIMIZE, minimize_button()->icon());
   EXPECT_EQ(CAPTION_BUTTON_ICON_CLOSE, close_button()->icon());
 }
 
 }  // namespace test
 }  // namespace ash