Revert "Use a single file for app snapshots."

runtime/bin/dartutils.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 "bin/dartutils.h"
 
 #include "bin/crypto.h"
 #include "bin/directory.h"
 #include "bin/extensions.h"
 #include "bin/file.h"
@@ skipping 174 matching lines @@
 const char* DartUtils::RemoveScheme(const char* url) {
   const char* colon = strchr(url, ':');
   if (colon == NULL) {
     return url;
   } else {
     return colon + 1;
   }
 }
 
 
+void* DartUtils::MapExecutable(const char* name, intptr_t* len) {
+  File* file = File::Open(name, File::kRead);
+  if (file == NULL) {
+    return NULL;
+  }
+  void* addr = file->MapExecutable(len);
+  file->Release();
+  return addr;
+}
+
+
 void* DartUtils::OpenFile(const char* name, bool write) {
   File* file = File::Open(name, write ? File::kWriteTruncate : File::kRead);
   return reinterpret_cast<void*>(file);
 }
 
 
 void DartUtils::ReadFile(const uint8_t** data,
                          intptr_t* len,
                          void* stream) {
   ASSERT(data != NULL);
@@ skipping 1049 matching lines @@
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }
 
 }  // namespace bin
 }  // namespace dart