CrOS - Fix text background of shelf tooltips.

ash/common/shelf/shelf_tooltip_manager.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/common/shelf/shelf_tooltip_manager.h"
 
 #include "ash/common/shelf/shelf_view.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/wm_lookup.h"
@@ skipping 59 matching lines @@
     SetLayoutManager(new views::FillLayout());
     views::Label* label = new views::Label(text);
     label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
     ui::NativeTheme* theme = anchor->GetWidget()->GetNativeTheme();
     label->SetEnabledColor(
         theme->GetSystemColor(ui::NativeTheme::kColorId_TooltipText));
     SkColor background_color =
         theme->GetSystemColor(ui::NativeTheme::kColorId_TooltipBackground);
     set_color(background_color);
     label->SetBackgroundColor(background_color);
+    // The background is not opaque, so we can't do subpixel rendering.
+    label->SetSubpixelRenderingEnabled(false);
     AddChildView(label);
-    // The bubble border has its own background so the background created by the
-    // BubbleDialogDelegateView is redundant and would cause extra opacity.
-    set_background(nullptr);
 
     gfx::Insets insets(kArrowTopBottomOffset, kArrowLeftRightOffset);
     // Adjust the anchor location for asymmetrical borders of shelf item.
     if (anchor->border())
       insets += anchor->border()->GetInsets();
     if (ui::MaterialDesignController::IsSecondaryUiMaterial())
       insets += gfx::Insets(-kBubblePaddingHorizontalBottom);
     set_anchor_view_insets(insets);
 
     views::BubbleDialogDelegateView::CreateBubble(this);
@@ skipping 165 matching lines @@
 
 bool ShelfTooltipManager::ShouldShowTooltipForView(views::View* view) {
   WmShelf* shelf = shelf_view_ ? shelf_view_->wm_shelf() : nullptr;
   return shelf && shelf_view_->ShouldShowTooltipForView(view) &&
          (shelf->GetVisibilityState() == SHELF_VISIBLE ||
           (shelf->GetVisibilityState() == SHELF_AUTO_HIDE &&
            shelf->GetAutoHideState() == SHELF_AUTO_HIDE_SHOWN));
 }
 
 }  // namespace ash