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

ipc/ipc_channel_reader_unittest.cc

 // Copyright 2015 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 "build/build_config.h"
 
 #include <set>
 
+#include "crypto/random.h"
 #include "ipc/attachment_broker.h"
 #include "ipc/brokerable_attachment.h"
 #include "ipc/ipc_channel_reader.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if USE_ATTACHMENT_BROKER
 namespace IPC {
 namespace internal {
 
 namespace {
 
+BrokerableAttachment::AttachmentId GenerateAttachementId() {
+  BrokerableAttachment::AttachmentId result;
+  crypto::RandBytes(result.nonce, BrokerableAttachment::kNonceSize);
+  return result;
+}
+
 class MockAttachment : public BrokerableAttachment {
  public:
-  MockAttachment(int internal_state) : internal_state_(internal_state) {}
+  MockAttachment(int internal_state)
+      : BrokerableAttachment(GenerateAttachementId(), true),
+        internal_state_(internal_state) {}
   MockAttachment(BrokerableAttachment::AttachmentId id)
       : BrokerableAttachment(id, true), internal_state_(-1) {}
 
   void PopulateWithAttachment(const BrokerableAttachment* attachment) override {
     const MockAttachment* mock_attachment =
         static_cast<const MockAttachment*>(attachment);
     internal_state_ = mock_attachment->internal_state_;
   }
 
 #if defined(OS_POSIX)
@@ skipping 99 matching lines @@
             reader.DispatchMessages());
   EXPECT_EQ(nullptr, reader.get_last_dispatched_message());
 
   broker.AddAttachment(attachment);
   EXPECT_EQ(m, reader.get_last_dispatched_message());
 }
 
 }  // namespace internal
 }  // namespace IPC
 #endif  // USE_ATTACHMENT_BROKER