[Ignition] Use separate startup data for ignition.

src/startup-data-util.cc

 // Copyright 2015 the V8 project 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 "src/startup-data-util.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
+#include "src/flags.h"
 #include "src/utils.h"
 
 
 namespace v8 {
 namespace internal {
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 
 namespace {
 
@@ skipping 78 matching lines @@
 
 }  // namespace
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 
 
 void InitializeExternalStartupData(const char* directory_path) {
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   char* natives;
   char* snapshot;
   LoadFromFiles(RelativePath(&natives, directory_path, "natives_blob.bin"),
-                RelativePath(&snapshot, directory_path, "snapshot_blob.bin"));
+                RelativePath(&snapshot, directory_path,
+                             FLAG_ignition ? "snapshot_blob_ignition.bin"
+                                           : "snapshot_blob.bin"));
   free(natives);
   free(snapshot);
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 }
 
 
 void InitializeExternalStartupData(const char* natives_blob,
                                    const char* snapshot_blob) {
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
   LoadFromFiles(natives_blob, snapshot_blob);
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 }
 
 }  // namespace internal
 }  // namespace v8