Pass path to platform kernel binary to kernel-service.

runtime/vm/unit_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/unit_test.h"
 
 #include <stdio.h>
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
@@ skipping 173 matching lines @@
                                   sourcefiles, kernel_pgm, incrementally);
 }
 
 char* TestCase::CompileTestScriptWithDFE(const char* url,
                                          int sourcefiles_count,
                                          Dart_SourceFile sourcefiles[],
                                          void** kernel_pgm,
                                          bool incrementally) {
   Zone* zone = Thread::Current()->zone();
   Dart_KernelCompilationResult compilation_result = Dart_CompileSourcesToKernel(
-      url, sourcefiles_count, sourcefiles, incrementally);
+      url, NULL /* platform binary can be found at the default location */,
+      sourcefiles_count, sourcefiles, incrementally);
 
   if (compilation_result.status != Dart_KernelCompilationStatus_Ok) {
     return OS::SCreate(zone, "Compilation failed %s", compilation_result.error);
   }
   const uint8_t* kernel_file = compilation_result.kernel;
   intptr_t kernel_length = compilation_result.kernel_size;
   if (kernel_file == NULL) {
     return OS::SCreate(zone, "front end generated a NULL kernel file");
   }
   *kernel_pgm = Dart_ReadKernelBinary(kernel_file, kernel_length);
@@ skipping 417 matching lines @@
     pos = strstr(in, prefix);
   }
   // Copy the remainder of in to out.
   while (*in != '\0') {
     *out++ = *in++;
   }
   *out = '\0';
 }
 
 }  // namespace dart