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

ipc/BUILD.gn

 # Copyright (c) 2012 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.
 
 import("//testing/test.gni")
 
 component("ipc") {
   sources = [
     "attachment_broker.cc",
     "attachment_broker.h",
@@ skipping 94 matching lines @@
     sources -= [ "unix_domain_socket_util.cc" ]
   }
 
   defines = [ "IPC_IMPLEMENTATION" ]
 
   deps = [
     "//base",
 
     # TODO(viettrungluu): Needed for base/lazy_instance.h, which is suspect.
     "//base/third_party/dynamic_annotations",
-    "//crypto:crypto",
   ]
+
+  if (is_win) {
+    # On windows HandleAttachmentWin needs to generate random IDs.
+    deps += [ "//crypto" ]
+  }
 }
 
 # TODO(GYP): crbug.com/360936. Get this to build and run on Android.
 if (!is_android) {
   group("ipc_tests_run") {
     testonly = true
     deps = [
       ":ipc_tests",
     ]
   }
@@ skipping 34 matching lines @@
     #  }
     #}
 
     deps = [
       ":ipc",
       ":test_support",
       "//base",
       "//base:i18n",
       "//base/test:run_all_unittests",
       "//base/test:test_support",
+      "//crypto",
       "//testing/gtest",
     ]
   }
 
   test("ipc_perftests") {
     sources = [
       "ipc_perftests.cc",
     ]
 
     # TODO(brettw) hook up Android testing.
@@ skipping 35 matching lines @@
     "ipc_test_sink.cc",
     "ipc_test_sink.h",
   ]
   deps = [
     ":ipc",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }