Remove dependency on //crypto in //ipc, except on windows.

ipc/brokerable_attachment.cc

Index: ipc/brokerable_attachment.cc
diff --git a/ipc/brokerable_attachment.cc b/ipc/brokerable_attachment.cc
index 70bd0b2cd306da18930c5c4a260530a8d2e6902d..681e2ba0b5626d39130626d7f2b6563dbf32b5f5 100644
--- a/ipc/brokerable_attachment.cc
+++ b/ipc/brokerable_attachment.cc
@@ -6,44 +6,8 @@
 
 #include "ipc/attachment_broker.h"
 
-#if USE_ATTACHMENT_BROKER
-#include "crypto/random.h"
-#endif
-
 namespace IPC {
 
-
-#if USE_ATTACHMENT_BROKER
-BrokerableAttachment::AttachmentId::AttachmentId() {
-// In order to prevent mutually untrusted processes from stealing resources from
-// one another, the nonce must be secret. This generates a 128-bit,
-// cryptographicaly-strong random number.
-  crypto::RandBytes(nonce, BrokerableAttachment::kNonceSize);
-}
-#else
-BrokerableAttachment::AttachmentId::AttachmentId() {
-  CHECK(false) << "Not allowed to construct an attachment id if the platform "
-                  "does not support attachment brokering.";
-}
-#endif
-
-BrokerableAttachment::AttachmentId::AttachmentId(const char* start_address,
-                                                 size_t size) {
-  DCHECK(size == BrokerableAttachment::kNonceSize);
-  for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i)
-    nonce[i] = start_address[i];
-}
-
-void BrokerableAttachment::AttachmentId::SerializeToBuffer(char* start_address,
-                                                           size_t size) {
-  DCHECK(size == BrokerableAttachment::kNonceSize);
-  for (size_t i = 0; i < BrokerableAttachment::kNonceSize; ++i)
-    start_address[i] = nonce[i];
-}
-
-BrokerableAttachment::BrokerableAttachment()
-    : needs_brokering_(false) {}
-
 BrokerableAttachment::BrokerableAttachment(const AttachmentId& id,
                                            bool needs_brokering)
     : id_(id), needs_brokering_(needs_brokering) {}