Introduce platform_util_lacros.cc

platform_util contains utilities for showing a file in a file explorer
and opening a URL with an external protocol handler. These will need
to be plumbed from lacros to ash via crosapi.

Introduce a stub file for lacros.  Rename the existing _chromeos file
to _ash to match our naming scheme.

No functional changes.

Bug: 1139128, 1140585
Change-Id: I51d50f3687010f8397c8ea584cce21caccbe6982
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2488084
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Darin Fisher <darin@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819892}

chrome/browser/BUILD.gn

@@ -4276,7 +4276,7 @@ static_library("browser") {
       "performance_manager/policies/userspace_swap_policy_chromeos.h",
       "performance_manager/policies/working_set_trimmer_policy_chromeos.cc",
       "performance_manager/policies/working_set_trimmer_policy_chromeos.h",
-      "platform_util_chromeos.cc",
+      "platform_util_ash.cc",
       "policy/default_geolocation_policy_handler.cc",
       "policy/default_geolocation_policy_handler.h",
       "renderer_context_menu/quick_answers_menu_observer.cc",
@@ -4418,8 +4418,7 @@ static_library("browser") {
     ]
   }
 
-  # TODO(crbug.com/1052397): Rename chromeos_is_browser_only to is_lacros.
-  if (chromeos_is_browser_only) {
+  if (is_lacros) {
     assert(enable_native_notifications)
     sources += [
       "feedback/show_feedback_page_lacros.cc",
@@ -4443,6 +4442,7 @@ static_library("browser") {
       "notifications/notification_platform_bridge_delegate.h",
       "notifications/notification_platform_bridge_lacros.cc",
       "notifications/notification_platform_bridge_lacros.h",
+      "platform_util_lacros.cc",
     ]
     deps += [
       "//chromeos/crosapi/mojom",
@@ -4862,7 +4862,6 @@ static_library("browser") {
       "first_run/upgrade_util_linux.cc",
       "first_run/upgrade_util_linux.h",
       "icon_loader_auralinux.cc",
-      "platform_util_linux.cc",
       "shell_integration_linux.cc",
       "shell_integration_linux.h",
       "themes/theme_service_aura_linux.cc",
@@ -4877,12 +4876,15 @@ static_library("browser") {
       deps += [ "//components/dbus/thread_linux" ]
     }
 
-    # TODO(crbug.com/1052397): Rename chromeos_is_browser_only to is_lacros.
-    if (enable_native_notifications && !chromeos_is_browser_only) {
-      sources += [
-        "notifications/notification_platform_bridge_linux.cc",
-        "notifications/notification_platform_bridge_linux.h",
-      ]
+    if (!is_lacros) {
+      sources += [ "platform_util_linux.cc" ]
+
+      if (enable_native_notifications) {
+        sources += [
+          "notifications/notification_platform_bridge_linux.cc",
+          "notifications/notification_platform_bridge_linux.h",
+        ]
+      }
     }
 
     if (use_x11) {

chrome/browser/platform_util_lacros.cc

+// Copyright 2020 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/platform_util.h"
+
+#include "base/notreached.h"
+#include "chrome/browser/platform_util_internal.h"
+
+namespace platform_util {
+namespace internal {
+
+void PlatformOpenVerifiedItem(const base::FilePath& path, OpenItemType type) {
+  NOTIMPLEMENTED();
+}
+
+}  // namespace internal
+
+void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
+  // TODO(https://crbug.com/1139128): Add crosapi to show item in file manager.
+  NOTIMPLEMENTED();
+}
+
+void OpenExternal(Profile* profile, const GURL& url) {
+  // TODO(https://crbug.com/1140585): Add crosapi for opening links with
+  // external protocol handlers.
+  NOTIMPLEMENTED();
+}
+
+}  // namespace platform_util