Revert 22380 to investigate windows build break.

runtime/bin/main.cc

Index: runtime/bin/main.cc
===================================================================
--- runtime/bin/main.cc	(revision 22381)
+++ runtime/bin/main.cc	(working copy)
@@ -262,6 +262,26 @@
 }
 
 
+static void* OpenFile(const char* name) {
+  File* file = File::Open(name, File::kWriteTruncate);
+  ASSERT(file != NULL);
+  return reinterpret_cast<void*>(file);
+}
+
+
+static void WriteFile(const void* buffer, intptr_t num_bytes, void* stream) {
+  ASSERT(stream != NULL);
+  File* file_stream = reinterpret_cast<File*>(stream);
+  bool bytes_written = file_stream->WriteFully(buffer, num_bytes);
+  ASSERT(bytes_written);
+}
+
+
+static void CloseFile(void* stream) {
+  delete reinterpret_cast<File*>(stream);
+}
+
+
 // Convert all the arguments to UTF8. On Windows, the arguments are
 // encoded in the current code page and not UTF8.
 //
@@ -712,10 +732,7 @@
 
   // Initialize the Dart VM.
   if (!Dart_Initialize(CreateIsolateAndSetup, NULL, NULL, ShutdownIsolate,
-                       DartUtils::OpenFile,
-                       DartUtils::ReadFile,
-                       DartUtils::WriteFile,
-                       DartUtils::CloseFile)) {
+                       OpenFile, WriteFile, CloseFile)) {
     fprintf(stderr, "%s", "VM initialization failed\n");
     fflush(stderr);
     return kErrorExitCode;