Move gtk-specific browser main parts stuff to its own file.

chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.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/ui/views/chrome_browser_main_extra_parts_views_linux.h"
+
+#include "base/command_line.h"
+#include "base/run_loop.h"
+#include "chrome/browser/chrome_browser_main.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/themes/theme_service.h"
+#include "chrome/browser/themes/theme_service_factory.h"
+#include "chrome/browser/ui/host_desktop.h"
+#include "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
+#include "chrome/browser/ui/simple_message_box.h"
+#include "chrome/browser/ui/views/frame/browser_view.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/grit/chromium_strings.h"
+#include "chrome/grit/generated_resources.h"
+#include "components/prefs/pref_service.h"
+#include "ui/aura/window.h"
+#include "ui/base/ime/input_method_initializer.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/ui_base_switches.h"
+#include "ui/gfx/screen.h"
+#include "ui/native_theme/native_theme_aura.h"
+#include "ui/native_theme/native_theme_dark_aura.h"
+#include "ui/views/linux_ui/linux_ui.h"
+#include "ui/views/widget/desktop_aura/desktop_screen.h"
+#include "ui/views/widget/native_widget_aura.h"
+
+namespace {
+
+ui::NativeTheme* GetNativeThemeForWindow(aura::Window* window) {
+  if (!window)
+    return nullptr;
+
+  Profile* profile = nullptr;
+  // Window types not listed here (such as tooltips) will never use Chrome
+  // theming.
+  if (window->type() == ui::wm::WINDOW_TYPE_NORMAL ||
+      window->type() == ui::wm::WINDOW_TYPE_POPUP) {
+    profile = reinterpret_cast<Profile*>(
+        window->GetNativeWindowProperty(Profile::kProfileKey));
+  }
+
+  // If using the system (GTK) theme, don't use an Aura NativeTheme at all.
+  // NB: ThemeService::UsingSystemTheme() might lag behind this pref. See
+  // http://crbug.com/585522
+  if (!profile || profile->GetPrefs()->GetBoolean(prefs::kUsesSystemTheme))
+    return nullptr;
+
+  // Use a dark theme for incognito browser windows that aren't
+  // custom-themed. Otherwise, normal Aura theme.
+  if (profile->GetProfileType() == Profile::INCOGNITO_PROFILE &&
+      ThemeServiceFactory::GetForProfile(profile)->UsingDefaultTheme() &&
+      BrowserView::GetBrowserViewForNativeWindow(window)) {
+    return ui::NativeThemeDarkAura::instance();
+  }
+
+  return ui::NativeThemeAura::instance();
+}
+
+}  // namespace
+
+ChromeBrowserMainExtraPartsViewsLinux::ChromeBrowserMainExtraPartsViewsLinux() {
+}
+
+ChromeBrowserMainExtraPartsViewsLinux::
+    ~ChromeBrowserMainExtraPartsViewsLinux() {}
+
+void ChromeBrowserMainExtraPartsViewsLinux::PreEarlyInitialization() {
+  // TODO(erg): Refactor this into a dlopen call when we add a GTK3 port.
+  views::LinuxUI* gtk2_ui = BuildGtk2UI();
+  gtk2_ui->SetNativeThemeOverride(base::Bind(&GetNativeThemeForWindow));
+  views::LinuxUI::SetInstance(gtk2_ui);
+}
+
+void ChromeBrowserMainExtraPartsViewsLinux::ToolkitInitialized() {
+  ChromeBrowserMainExtraPartsViews::ToolkitInitialized();
+  views::LinuxUI::instance()->Initialize();
+}
+
+void ChromeBrowserMainExtraPartsViewsLinux::PreCreateThreads() {
+  ChromeBrowserMainExtraPartsViews::PreCreateThreads();
+  views::LinuxUI::instance()->UpdateDeviceScaleFactor(
+      gfx::Screen::GetScreen()->GetPrimaryDisplay().device_scale_factor());
+}
+
+void ChromeBrowserMainExtraPartsViewsLinux::PreProfileInit() {
+  // On the Linux desktop, we want to prevent the user from logging in as root,
+  // so that we don't destroy the profile. Now that we have some minimal ui
+  // initialized, check to see if we're running as root and bail if we are.
+  if (getuid() != 0)
+    return;
+
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kUserDataDir))
+    return;
+
+  base::string16 title = l10n_util::GetStringFUTF16(
+      IDS_REFUSE_TO_RUN_AS_ROOT, l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
+  base::string16 message = l10n_util::GetStringFUTF16(
+      IDS_REFUSE_TO_RUN_AS_ROOT_2, l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
+
+  chrome::ShowMessageBox(NULL, title, message,
+                         chrome::MESSAGE_BOX_TYPE_WARNING);
+
+  // Avoids gpu_process_transport_factory.cc(153)] Check failed:
+  // per_compositor_data_.empty() when quit is chosen.
+  base::RunLoop().RunUntilIdle();
+
+  exit(EXIT_FAILURE);
+}