Implement App-Scoped Security scoped bookmarks (#11711)

* implementation of security scoped bookmarks

* option is now only available on mas builds

atom/browser/api/atom_api_app_mas.mm

@@ -0,0 +1,59 @@
+// Copyright (c) 2013 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/api/atom_api_app.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/strings/sys_string_conversions.h"
+
+namespace atom {
+
+namespace api {
+
+// Callback passed to js which will stop accessing the given bookmark.
+void OnStopAccessingSecurityScopedResource(NSURL* bookmarkUrl) {
+  [bookmarkUrl stopAccessingSecurityScopedResource];
+  [bookmarkUrl release];
+}
+
+// Get base64 encoded NSData, create a bookmark for it and start accessing it.
+base::Callback<void ()> App::StartAccessingSecurityScopedResource(mate::Arguments* args) {
+  std::string data;
+  args->GetNext(&data);
+  NSString *base64str = base::SysUTF8ToNSString(data);
+  NSData *bookmarkData = [[NSData alloc] initWithBase64EncodedString: base64str options: 0];
+
+  // Create bookmarkUrl from NSData.
+  BOOL isStale = false;
+  NSError *error = nil;
+  NSURL *bookmarkUrl = [NSURL URLByResolvingBookmarkData: bookmarkData
+                                                 options: NSURLBookmarkResolutionWithSecurityScope
+                                           relativeToURL: nil
+                                     bookmarkDataIsStale: &isStale
+                                                   error: &error];
+
+  if (error != nil) {
+    NSString *err = [NSString stringWithFormat: @"NSError: %@ %@", error, [error userInfo]];
+    args->ThrowError(base::SysNSStringToUTF8(err));
+  }
+
+  if (isStale) {
+    args->ThrowError("bookmarkDataIsStale - try recreating the bookmark");
+  }
+
+  if (error == nil && isStale == false) {
+    [bookmarkUrl startAccessingSecurityScopedResource];
+  }
+
+  // Stop the NSURL from being GC'd.
+  [bookmarkUrl retain];
+
+  // Return a js callback which will close the bookmark.
+  return base::Bind(&OnStopAccessingSecurityScopedResource, bookmarkUrl);
+}
+
+} // namespace atom
+
+} // namespace api