Install platform apps into a separate data directory

chrome/common/extensions/extension_file_util.cc

Index: chrome/common/extensions/extension_file_util.cc
diff --git a/chrome/common/extensions/extension_file_util.cc b/chrome/common/extensions/extension_file_util.cc
index ebc064443aab7b62950233e387af8cb957350514..9a735b3f3a4b01a2ddc0575532889c73f519fbd8 100644
--- a/chrome/common/extensions/extension_file_util.cc
+++ b/chrome/common/extensions/extension_file_util.cc
@@ -46,7 +46,8 @@ const char kInstallDirectoryName[] = "Extensions";
 FilePath InstallExtension(const FilePath& unpacked_source_dir,
                           const std::string& id,
                           const std::string& version,
-                          const FilePath& all_extensions_dir) {
+                          const FilePath& all_extensions_dir,
+                          bool should_delete_source) {
   FilePath extension_dir = all_extensions_dir.AppendASCII(id);
   FilePath version_dir;
 
@@ -81,7 +82,8 @@ FilePath InstallExtension(const FilePath& unpacked_source_dir,
                << " to : " << extension_temp_dir.path().value() << " failed.";
     return FilePath();
   }
-  file_util::Delete(unpacked_source_dir, true);
+  if (should_delete_source)
+    file_util::Delete(unpacked_source_dir, true);
   FilePath crx_temp_source =
       extension_temp_dir.path().Append(unpacked_source_dir.BaseName());