Files app: Move global entities used from foreground

Move launchFileManager() from `launcher` namespace and registerDialog()
from global namespace to the interface FileBrowserBackgroundFull.

This keeps consistent all access from foreground page going through this
interface.

Bug: 1133186
Change-Id: I91157545620013baeef6eaa0143a5758a289a8ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2612254
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Jeremie Boulic <jboulic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840950}

ui/file_manager/file_manager/background/js/BUILD.gn

@@ -90,6 +90,7 @@ js_type_check("closure_compile_jsmodules") {
     ":media_import_handler.m",
     ":media_scanner.m",
     ":metadata_proxy.m",
+    ":metrics_start.m",
     ":mock_drive_sync_handler.m",
     ":mock_file_operation_manager.m",
     ":mock_progress_center.m",
@@ -662,6 +663,13 @@ js_unittest("metadata_proxy_unittest.m") {
   ]
 }
 
+js_library("metrics_start.m") {
+  sources = [ "$root_gen_dir/ui/file_manager/file_manager/background/js/metrics_start.m.js" ]
+  deps = [ "//ui/file_manager/file_manager/common/js:metrics.m" ]
+
+  extra_deps = [ ":modulize" ]
+}
+
 js_library("import_history") {
   deps = [
     ":metadata_proxy",
@@ -1043,6 +1051,22 @@ js_library("test_util_base.m") {
   extra_deps = [ ":modulize" ]
 }
 
+js_library("test_util.m") {
+  sources = [
+    "$root_gen_dir/ui/file_manager/file_manager/background/js/test_util.m.js",
+  ]
+
+  deps = [
+    ":background.m",
+    ":launcher.m",
+    ":test_util_base.m",
+    "//ui/file_manager/file_manager/common/js:progress_center_common.m",
+    "//ui/file_manager/file_manager/common/js:util.m",
+  ]
+
+  extra_deps = [ ":modulize" ]
+}
+
 js_library("test_import_history") {
   testonly = true
   deps = [
@@ -1269,8 +1293,10 @@ js_modulizer("modulize") {
     "mock_file_operation_manager.js",
     "mock_progress_center.js",
     "mount_metrics.js",
+    "metrics_start.js",
     "task_queue.js",
     "test_import_history.js",
+    "test_util.js",
     "import_history.js",
     "drive_sync_handler.js",
     "media_scanner.js",

ui/file_manager/file_manager/background/js/metrics_start.js

@@ -8,4 +8,6 @@
  * scripts that define the metrics namespace).
  */
 
+// #import {metrics} from '../../common/js/metrics.m.js';
+
 metrics.startInterval('Load.BackgroundScript');

ui/file_manager/file_manager/background/js/test_util.js

@@ -2,6 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// clang-format off
+// #import {background} from './background.m.js';
+// #import {test} from './test_util_base.m.js';
+// #import {launcher} from './launcher.m.js';
+// #import {util} from '../../common/js/util.m.js';
+// #import {ProgressCenterItem} from '../../common/js/progress_center_common.m.js';
+// clang-format on
+
 /**
  * Opens the main Files app's window and waits until it is ready.
  *