Remove dependency from //mojo to //crypto

mojo/dart/embedder/test/run_dart_tests.cc

 // Copyright 2014 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 "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
-#include "crypto/random.h"
+#include "base/rand_util.h"
 #include "mojo/dart/embedder/dart_controller.h"
 #include "mojo/public/c/system/types.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // TODO(zra): Pull vm options from the test scripts.
 
 namespace mojo {
 namespace dart {
 namespace {
 
 static bool generateEntropy(uint8_t* buffer, intptr_t length) {
-  crypto::RandBytes(reinterpret_cast<void*>(buffer), length);
+  base::RandBytes(reinterpret_cast<void*>(buffer), length);
   return true;
 }
 
 static void exceptionCallback(bool* exception, Dart_Handle error) {
   *exception = true;
 }
 
 static void RunTest(const std::string& test,
                     bool compile_all,
                     const char** extra_args,
@@ skipping 115 matching lines @@
   const int kNumArgs = 2;
   const char* args[kNumArgs];
   args[0] = "--new-gen-semi-max-size=1";
   args[1] = "--old_gen_growth_rate=1";
   RunTest("handle_finalizer_test.dart", false, args, kNumArgs);
 }
 
 }  // namespace
 }  // namespace dart
 }  // namespace mojo