Revert of Use same blob format for internal and external snapshots.

src/natives-external.cc

Index: src/natives-external.cc
diff --git a/src/natives-external.cc b/src/natives-external.cc
index 43120912879525cba365e8196b9fbb18fea9cadb..cfa00bc1345a1cb746d8946ceeb272cf7d444eeb 100644
--- a/src/natives-external.cc
+++ b/src/natives-external.cc
@@ -9,11 +9,6 @@
 #include "src/list-inl.h"
 #include "src/snapshot-source-sink.h"
 #include "src/vector.h"
-
-#ifndef V8_USE_EXTERNAL_STARTUP_DATA
-#error natives-external.cc is used only for the external snapshot build.
-#endif  // V8_USE_EXTERNAL_STARTUP_DATA
-
 
 namespace v8 {
 namespace internal {
@@ -147,7 +142,8 @@
   DCHECK(natives_blob->data);
   DCHECK(natives_blob->raw_size > 0);
 
-  SnapshotByteSource bytes(natives_blob->data, natives_blob->raw_size);
+  SnapshotByteSource bytes(reinterpret_cast<const byte*>(natives_blob->data),
+                           natives_blob->raw_size);
   NativesHolder<CORE>::set(NativesStore::MakeFromScriptsSource(&bytes));
   NativesHolder<EXPERIMENTAL>::set(NativesStore::MakeFromScriptsSource(&bytes));
   DCHECK(!bytes.HasMore());
@@ -192,7 +188,7 @@
 
 
 // The compiler can't 'see' all uses of the static methods and hence
-// my choice to elide them. This we'll explicitly instantiate these.
+// my chose to elide them. This we'll explicitly instantiate these.
 template class NativesCollection<CORE>;
 template class NativesCollection<EXPERIMENTAL>;