refactor: rename the atom directory to shell

shell/common/mac/main_application_bundle.mm

@@ -0,0 +1,56 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright (c) 2013 Adam Roben <adam@roben.org>. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE-CHROMIUM file.
+
+#import "atom/common/mac/main_application_bundle.h"
+
+#include "base/files/file_path.h"
+#include "base/mac/bundle_locations.h"
+#include "base/mac/foundation_util.h"
+#include "base/path_service.h"
+#include "base/strings/string_util.h"
+
+namespace atom {
+
+namespace {
+
+bool HasMainProcessKey() {
+  NSDictionary* info_dictionary = [base::mac::MainBundle() infoDictionary];
+  return
+      [[info_dictionary objectForKey:@"ElectronMainProcess"] boolValue] != NO;
+}
+
+}  // namespace
+
+base::FilePath MainApplicationBundlePath() {
+  // Start out with the path to the running executable.
+  base::FilePath path;
+  base::PathService::Get(base::FILE_EXE, &path);
+
+  // Up to Contents.
+  if (!HasMainProcessKey() &&
+      base::EndsWith(path.value(), " Helper", base::CompareCase::SENSITIVE)) {
+    // The running executable is the helper. Go up five steps:
+    // Contents/Frameworks/Helper.app/Contents/MacOS/Helper
+    // ^ to here                                     ^ from here
+    path = path.DirName().DirName().DirName().DirName().DirName();
+  } else {
+    // One step up to MacOS, another to Contents.
+    path = path.DirName().DirName();
+  }
+  DCHECK_EQ(path.BaseName().value(), "Contents");
+
+  // Up one more level to the .app.
+  path = path.DirName();
+  DCHECK_EQ(path.BaseName().Extension(), ".app");
+
+  return path;
+}
+
+NSBundle* MainApplicationBundle() {
+  return [NSBundle bundleWithPath:base::mac::FilePathToNSString(
+                                      MainApplicationBundlePath())];
+}
+
+}  // namespace atom