IPC: Add MojoHandleAttachment

ipc/ipc_message_attachment_set.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ipc/ipc_message_attachment_set.h"
 
 #include <algorithm>
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "ipc/ipc_message_attachment.h"
@@ skipping 27 matching lines @@
                << consumed_descriptor_highwater_ << "/" << size();
 }
 
 unsigned MessageAttachmentSet::num_descriptors() const {
   return std::count_if(attachments_.begin(), attachments_.end(),
                        [](scoped_refptr<MessageAttachment> i) {
     return i->GetType() == MessageAttachment::TYPE_PLATFORM_FILE;
   });
 }
 
+unsigned MessageAttachmentSet::num_mojo_handles() const {
+  return std::count_if(attachments_.begin(), attachments_.end(),
+                       [](scoped_refptr<MessageAttachment> i) {
+    return i->GetType() == MessageAttachment::TYPE_MOJO_HANDLE;
+  });
+}
+
 unsigned MessageAttachmentSet::size() const {
   return static_cast<unsigned>(attachments_.size());
 }
 
 bool MessageAttachmentSet::AddAttachment(
     scoped_refptr<MessageAttachment> attachment) {
 #if defined(OS_POSIX)
-  if (attachment->GetType() != MessageAttachment::TYPE_PLATFORM_FILE ||
+  if (attachment->GetType() == MessageAttachment::TYPE_PLATFORM_FILE &&
       num_descriptors() == kMaxDescriptorsPerMessage) {
     DLOG(WARNING) << "Cannot add file descriptor. MessageAttachmentSet full.";
     return false;
   }
 #endif
 
   attachments_.push_back(attachment);
   return true;
 }
 
@@ skipping 81 matching lines @@
   for (unsigned i = 0; i < count; ++i)
     AddAttachment(
         new internal::PlatformFileAttachment(base::ScopedFD(buffer[i])));
 }
 
 #endif  // OS_POSIX
 
 }  // namespace IPC