Clean up NativeTheme (particularly CommonTheme).

ui/views/style/platform_style_mac.mm

 // Copyright 2015 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/style/platform_style.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/paint_vector_icon.h"
@@ skipping 62 matching lines @@
     // the pressed state for default buttons.
     state = Button::STATE_PRESSED;
   }
   return color_by_state[state];
 }
 
 // static
 void PlatformStyle::ApplyLabelButtonTextStyle(
     views::Label* label,
     ButtonColorByState* color_by_state) {
-  const ui::NativeTheme* theme = label->GetNativeTheme();
   ButtonColorByState& colors = *color_by_state;
-  colors[Button::STATE_PRESSED] =
-      theme->GetSystemColor(ui::NativeTheme::kColorId_ButtonHighlightColor);
+  colors[Button::STATE_PRESSED] = SK_ColorWHITE;

[sky, 2016/10/03 16:12:05]

How come there isn't a constant for this?

[Evan Stade, 2016/10/03 19:46:44]

in what sense? Here in this file or in NativeTheme?

I don't think it belongs in NativeTheme if it's only used in this one place, and
it will be removed anyway as soon as Harmony is default (this whole function
goes away).

[sky, 2016/10/03 21:25:15]

Ok, fair enouh.

 }
 
 // static
 void PlatformStyle::OnTextfieldKeypressUnhandled() {
   NSBeep();
 }
 
 }  // namespace views