Fixing renderer's access to a file from HTTP POST (after a xsite transfer).

content/common/resource_request_body.cc

Index: content/common/resource_request_body.cc
diff --git a/content/common/resource_request_body.cc b/content/common/resource_request_body.cc
index b2b0c5fd96dc41254a5ba15aca33fd8db3163174..f1fb8cebe9b165593eb18f831bc636fd5cebbaeb 100644
--- a/content/common/resource_request_body.cc
+++ b/content/common/resource_request_body.cc
@@ -48,6 +48,15 @@ void ResourceRequestBody::AppendFileSystemFileRange(
                                            expected_modification_time);
 }
 
+std::vector<base::FilePath> ResourceRequestBody::GetReferencedFiles() const {
+  std::vector<base::FilePath> result;
+  for (const auto& element : *elements()) {
+    if (element.type() == Element::TYPE_FILE)
+      result.push_back(element.path());
+  }
+  return result;
+}
+
 ResourceRequestBody::~ResourceRequestBody() {
 }