Install platform apps into a separate data directory

chrome/app/app_mode_loader_mac.mm

Index: chrome/app/app_mode_loader_mac.mm
diff --git a/chrome/app/app_mode_loader_mac.mm b/chrome/app/app_mode_loader_mac.mm
index dc25c4bb299970007b587ba342622e5327131e8e..51d4aa8b5eee6b9727e7931c041d05f8a63afb6d 100644
--- a/chrome/app/app_mode_loader_mac.mm
+++ b/chrome/app/app_mode_loader_mac.mm
@@ -16,6 +16,7 @@
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
+#include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/sys_string_conversions.h"
 #import "chrome/common/mac/app_mode_chrome_locator.h"
@@ -92,6 +93,9 @@ void LoadFramework(void** cr_dylib, app_mode::ChromeAppModeInfo* info) {
       [info_plist objectForKey:app_mode::kCrAppModeShortcutURLKey]);
   CHECK(info->app_mode_url.size()) << "couldn't get app shortcut URL";
 
+  info->user_data_dir = base::mac::NSStringToFilePath(
+      [info_plist objectForKey:app_mode::kCrAppModeUserDataDirKey]);
+
   // Open the framework.
   *cr_dylib = dlopen(framework_shlib_path.value().c_str(), RTLD_LAZY);
   CHECK(cr_dylib) << "couldn't load framework: " << dlerror();