IPC: Use <algorithm> helpers for comparing arrays

ipc/brokerable_attachment.h

Index: ipc/brokerable_attachment.h
diff --git a/ipc/brokerable_attachment.h b/ipc/brokerable_attachment.h
index ce3082cd92b8986557d9245f5799567feb22aa06..6761f22a7126daf5875e7fdfa44238e5508042b4 100644
--- a/ipc/brokerable_attachment.h
+++ b/ipc/brokerable_attachment.h
@@ -7,6 +7,8 @@
 
 #include <stdint.h>
 
+#include <algorithm>
+
 #include "base/macros.h"
 #include "ipc/ipc_export.h"
 #include "ipc/ipc_message_attachment.h"
@@ -37,21 +39,12 @@ class IPC_EXPORT BrokerableAttachment : public MessageAttachment {
     void SerializeToBuffer(char* start_address, size_t size);
 
     bool operator==(const AttachmentId& rhs) const {
-      for (size_t i = 0; i < kNonceSize; ++i) {
-        if (nonce[i] != rhs.nonce[i])
-          return false;
-      }
-      return true;
+      return std::equal(nonce, nonce + kNonceSize, rhs.nonce);
     }
 
     bool operator<(const AttachmentId& rhs) const {
-      for (size_t i = 0; i < kNonceSize; ++i) {
-        if (nonce[i] < rhs.nonce[i])
-          return true;
-        if (nonce[i] > rhs.nonce[i])
-          return false;
-      }
-      return false;
+      return std::lexicographical_compare(nonce, nonce + kNonceSize, rhs.nonce,
+                                          rhs.nonce + kNonceSize);
     }
   };