[Ash] Remove pre-MD code paths from HoverHighlightView

ash/common/system/tray/tray_constants.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 "ash/common/system/tray/tray_constants.h"
 
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/color_palette.h"
 
@@ skipping 47 matching lines @@
 
 const int kTrayPopupDetailsIconWidth = 25;
 const int kTrayPopupDetailsLabelExtraLeftMargin = 8;
 const SkColor kTrayPopupHoverBackgroundColor = SkColorSetRGB(0xe4, 0xe4, 0xe4);
 const int kTrayPopupScrollSeparatorHeight = 15;
 const int kTrayRoundedBorderRadius = 2;
 
 const int kTrayToggleButtonWidth = 68;
 
 const SkColor kBackgroundColor = SkColorSetRGB(0xfe, 0xfe, 0xfe);
-const SkColor kHoverBackgroundColor = SkColorSetRGB(0xf3, 0xf3, 0xf3);
 const SkColor kPublicAccountUserCardTextColor = SkColorSetRGB(0x66, 0x66, 0x66);
 const SkColor kPublicAccountUserCardNameColor = SK_ColorBLACK;
 
 const SkColor kHeaderBackgroundColor = SkColorSetRGB(0xf5, 0xf5, 0xf5);
 
 const SkColor kBorderDarkColor = SkColorSetRGB(0xaa, 0xaa, 0xaa);
 const SkColor kBorderLightColor = SkColorSetRGB(0xeb, 0xeb, 0xeb);
 const SkColor kButtonStrokeColor = SkColorSetRGB(0xdd, 0xdd, 0xdd);
 
 const SkColor kHeaderTextColorNormal = SkColorSetARGB(0x7f, 0, 0, 0);
@@ skipping 26 matching lines @@
 
 const SkColor kTrayPopupInkDropBaseColor = SK_ColorBLACK;
 const float kTrayPopupInkDropRippleOpacity = 0.06f;
 const float kTrayPopupInkDropHighlightOpacity = 0.08f;
 const int kTrayPopupInkDropInset = 4;
 const int kTrayPopupInkDropCornerRadius = 2;
 
 const int kTrayPopupSystemInfoRowHeight = 40;
 
 }  // namespace ash