ipc: Move //crypto dependency into a Windows-only file.

ipc/brokerable_attachment.cc

Index: ipc/brokerable_attachment.cc
diff --git a/ipc/brokerable_attachment.cc b/ipc/brokerable_attachment.cc
index 681e2ba0b5626d39130626d7f2b6563dbf32b5f5..2b7880923920d17ad12898280120f54008c396bb 100644
--- a/ipc/brokerable_attachment.cc
+++ b/ipc/brokerable_attachment.cc
@@ -8,6 +8,30 @@
 
 namespace IPC {
 
+#if !USE_ATTACHMENT_BROKER
+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) {}