ChildProcessSecurityPolicy: Port FileAPIMessageFilter to use new checks

content/renderer/pepper/pepper_file_io_host.cc

Index: content/renderer/pepper/pepper_file_io_host.cc
diff --git a/content/renderer/pepper/pepper_file_io_host.cc b/content/renderer/pepper/pepper_file_io_host.cc
index aedf882b4b7632f7503a2701e4817d5a09b8185f..d6cd8fa4137874a947456ea673c4b42aa543fa78 100644
--- a/content/renderer/pepper/pepper_file_io_host.cc
+++ b/content/renderer/pepper/pepper_file_io_host.cc
@@ -222,14 +222,9 @@ int32_t PepperFileIOHost::OnHostMsgOpen(
   if (rv != PP_OK)
     return rv;
 
-  // TODO(tommycli): Eventually just pass the Pepper flags straight to the
-  // FileSystemDispatcher so it can handle doing the security check.
-  int platform_file_flags = 0;
   open_flags_ = open_flags;
-  if (!ppapi::PepperFileOpenFlagsToPlatformFileFlags(open_flags,
-                                                     &platform_file_flags)) {
+  if (!ppapi::PepperFileOpenFlagsToPlatformFileFlags(open_flags, NULL))
     return PP_ERROR_BADARGUMENT;
-  }
 
   ppapi::host::ResourceHost* resource_host =
       renderer_ppapi_host_->GetPpapiHost()->GetResourceHost(file_ref_resource);
@@ -248,8 +243,8 @@ int32_t PepperFileIOHost::OnHostMsgOpen(
         &PepperFileIOHost::ExecutePlatformOpenFileSystemURLCallback,
         weak_factory_.GetWeakPtr(),
         context->MakeReplyMessageContext());
-    file_system_dispatcher->OpenFile(
-        file_system_url_, platform_file_flags,
+    file_system_dispatcher->OpenPepperFile(
+        file_system_url_, open_flags,
         base::Bind(&DidOpenFileSystemURL, callback),
         base::Bind(&DidFailOpenFileSystemURL, callback));
   } else {