Revert of Monitor the system native frame color on Win 10.

chrome/browser/themes/theme_service_win.cc

-// Copyright 2016 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 "chrome/browser/themes/theme_service_win.h"
-
-#include "base/bind.h"
-#include "base/win/windows_version.h"
-#include "chrome/browser/themes/theme_properties.h"
-#include "grit/theme_resources.h"
-#include "skia/ext/skia_utils_win.h"
-#include "ui/base/win/shell.h"
-
-ThemeServiceWin::ThemeServiceWin() {
-  // This just checks for Windows 10 instead of calling ShouldUseDwmFrameColor()
-  // because we want to monitor the frame color even when a custom frame is in
-  // use, so that it will be correct if at any time the user switches to the
-  // native frame.
-  if (base::win::GetVersion() >= base::win::VERSION_WIN10) {
-    dwm_key_.reset(new base::win::RegKey(
-        HKEY_CURRENT_USER, L"SOFTWARE\\Microsoft\\Windows\\DWM", KEY_READ));
-    OnDwmKeyUpdated();
-  }
-}
-
-ThemeServiceWin::~ThemeServiceWin() {
-}
-
-bool ThemeServiceWin::ShouldUseNativeFrame() const {
-  return !HasCustomImage(IDR_THEME_FRAME) && ui::win::IsAeroGlassEnabled();
-}
-
-SkColor ThemeServiceWin::GetDefaultColor(int id, bool incognito) const {
-  if (ShouldUseDwmFrameColor()) {
-    // Active native windows on Windows 10 may have a custom frame color.
-    if (id == ThemeProperties::COLOR_FRAME)
-      return dwm_frame_color_;
-
-    // Inactive native windows on Windows 10 always have a white frame.
-    if (id == ThemeProperties::COLOR_FRAME_INACTIVE)
-        return SK_ColorWHITE;
-  }
-
-  return ThemeService::GetDefaultColor(id, incognito);
-}
-
-bool ThemeServiceWin::ShouldUseDwmFrameColor() const {
-  return ShouldUseNativeFrame() &&
-         (base::win::GetVersion() >= base::win::VERSION_WIN10);
-}
-
-void ThemeServiceWin::OnDwmKeyUpdated() {
-  // Attempt to read the accent color.
-  DWORD accent_color, color_prevalence;
-  dwm_frame_color_ =
-      ((dwm_key_->ReadValueDW(L"ColorPrevalence", &color_prevalence) ==
-        ERROR_SUCCESS) &&
-       (color_prevalence == 1) &&
-       (dwm_key_->ReadValueDW(L"AccentColor", &accent_color) == ERROR_SUCCESS))
-          ? skia::COLORREFToSkColor(accent_color)
-          : SK_ColorWHITE;
-
-  // Watch for future changes.
-  if (!dwm_key_->StartWatching(base::Bind(
-          &ThemeServiceWin::OnDwmKeyUpdated, base::Unretained(this))))
-    dwm_key_.reset();
-}