Loosen permission on extension temp dir when a flag is used.

base/scoped_temp_dir.cc

Index: base/scoped_temp_dir.cc
diff --git a/base/scoped_temp_dir.cc b/base/scoped_temp_dir.cc
index c8ed9c6c86fe53284d4fbb42cd886881c5027d65..28f59bf1c4b37b60e93f73eafec1c0cc1e6c4ce7 100644
--- a/base/scoped_temp_dir.cc
+++ b/base/scoped_temp_dir.cc
@@ -4,6 +4,7 @@
 
 #include "base/scoped_temp_dir.h"
 
+#include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
@@ -26,15 +27,19 @@ bool ScopedTempDir::CreateUniqueTempDir() {
   return true;
 }
 
-bool ScopedTempDir::CreateUniqueTempDirUnderPath(const FilePath& base_path) {
+bool ScopedTempDir::CreateUniqueTempDirUnderPath(const FilePath& base_path,
+                                                 bool loose_permissions) {
   // If |path| does not exist, create it.
-  if (!file_util::CreateDirectory(base_path))
+  if (!file_util::CreateDirectory(base_path)) {
+    LOG(ERROR) << "Failed to create base directory " << base_path.value();
     return false;
+  }
 
-  // Create a new, uniquly named directory under |base_path|.
+  // Create a new, uniquely named directory under |base_path|.
   if (!file_util::CreateTemporaryDirInDir(
           base_path,
           FILE_PATH_LITERAL("scoped_dir_"),
+          loose_permissions,
           &path_)) {
     return false;
   }