Clang: Do not ignore result of HANDLE_EINTR.

ipc/file_descriptor_set_posix.cc

Index: ipc/file_descriptor_set_posix.cc
diff --git a/ipc/file_descriptor_set_posix.cc b/ipc/file_descriptor_set_posix.cc
index 3796fae6a04e757b16605ab8da83962389ba4053..7f17322de47b2f46095604b3be6763db0d71ee96 100644
--- a/ipc/file_descriptor_set_posix.cc
+++ b/ipc/file_descriptor_set_posix.cc
@@ -30,7 +30,8 @@ FileDescriptorSet::~FileDescriptorSet() {
   for (unsigned i = consumed_descriptor_highwater_;
        i < descriptors_.size(); ++i) {
     if (descriptors_[i].auto_close)
-      HANDLE_EINTR(close(descriptors_[i].fd));
+      if (HANDLE_EINTR(close(descriptors_[i].fd)) < 0)
+        PLOG(ERROR) << "close";
   }
 }
 
@@ -113,7 +114,8 @@ void FileDescriptorSet::CommitAll() {
   for (std::vector<base::FileDescriptor>::iterator
        i = descriptors_.begin(); i != descriptors_.end(); ++i) {
     if (i->auto_close)
-      HANDLE_EINTR(close(i->fd));
+      if (HANDLE_EINTR(close(i->fd)) < 0)
+        PLOG(ERROR) << "close";
   }
   descriptors_.clear();
   consumed_descriptor_highwater_ = 0;