AppShell support for Mac.

extensions/shell/app/paths_mac.mm

+// Copyright 2014 The Chromium Authors. All rights reserved.

[Yoyo Zhou, 2014/12/10 02:18:19]

This is very similar to content/shell/app/paths_mac.cc (and it's only one
example of such). Both depend very much on the respective definitions of the
helper targets in the .gyp, but I wonder if it'd make sense to combine them.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "extensions/shell/app/paths_mac.h"
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/mac/bundle_locations.h"
+#include "base/mac/foundation_util.h"
+#include "content/public/common/content_paths.h"
+
+namespace extensions {
+
+namespace {
+
+base::FilePath GetFrameworksPath() {
+  base::FilePath path;
+  PathService::Get(base::FILE_EXE, &path);
+  // We now have a path .../App Shell.app/Contents/MacOS/App Shell, and want to
+  // transform it into \
+  // .../App Shell.app/Contents/Frameworks/App Shell Framework.framework.
+  // But if it's App Shell Helper.app (inside Frameworks), we must go deeper.
+  if (base::mac::IsBackgroundOnlyProcess()) {
+    path = path.DirName().DirName().DirName().DirName().DirName();
+  } else {
+    path = path.DirName().DirName();
+  }
+  DCHECK_EQ("Contents", path.BaseName().value());
+  path = path.Append("Frameworks");
+  return path;
+}
+
+}  // namespace
+
+void OverrideFrameworkBundlePath() {
+  base::FilePath path =
+      GetFrameworksPath().Append("App Shell Framework.framework");
+  base::mac::SetOverrideFrameworkBundlePath(path);
+}
+
+void OverrideChildProcessFilePath() {
+  base::FilePath path = GetFrameworksPath()
+                            .Append("App Shell Helper.app")
+                            .Append("Contents")
+                            .Append("MacOS")
+                            .Append("App Shell Helper");
+  PathService::Override(content::CHILD_PROCESS_EXE, path);
+}
+
+base::FilePath GetResourcesPakFilePath() {
+  return base::mac::PathForFrameworkBundleResource(
+      CFSTR("extensions_shell_and_test.pak"));
+}
+
+}  // namespace extensions