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

content/browser/child_process_security_policy_impl.cc

Index: content/browser/child_process_security_policy_impl.cc
diff --git a/content/browser/child_process_security_policy_impl.cc b/content/browser/child_process_security_policy_impl.cc
index d8e601cf5af1128ded767809cb83a9df80148c0c..5abcc8552827c1e9520049bee14f39a4ab812d9e 100644
--- a/content/browser/child_process_security_policy_impl.cc
+++ b/content/browser/child_process_security_policy_impl.cc
@@ -4,6 +4,7 @@
 
 #include "content/browser/child_process_security_policy_impl.h"
 
+#include <algorithm>
 #include <utility>
 
 #include "base/command_line.h"
@@ -366,6 +367,15 @@ bool ChildProcessSecurityPolicyImpl::IsWebSafeScheme(
   return ContainsKey(web_safe_schemes_, scheme);
 }
 
+bool ChildProcessSecurityPolicyImpl::CanReadAllFiles(
+    int child_id,
+    const std::vector<base::FilePath>& files) {
+  return std::all_of(files.begin(), files.end(),
+                     [this, child_id](const base::FilePath& file) {
+                       return CanReadFile(child_id, file);
+                     });
+}
+
 void ChildProcessSecurityPolicyImpl::RegisterPseudoScheme(
     const std::string& scheme) {
   base::AutoLock lock(lock_);