Split Snapshot::kFull into kCore, kAppWithJIT, and kAppNoJIT. Remove snapshot_code flag.

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 2e67ee2d9b68434c4989cbe032c0b6eaa413bd18..28c31e281a127903cdd249117f63a2ad8f794fcb 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -992,15 +992,23 @@ class RawScript : public RawObject {
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->url_); }
   RawString* url_;
-  RawObject** to_precompiled_snapshot() {
-    return reinterpret_cast<RawObject**>(&ptr()->url_);
-  }
   RawTokenStream* tokens_;
-  RawObject** to_snapshot() {
-    return reinterpret_cast<RawObject**>(&ptr()->tokens_);
-  }
   RawString* source_;
   RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->source_); }
+  RawObject** to_snapshot(Snapshot::Kind kind) {
+    switch (kind) {
+      case Snapshot::kAppNoJIT:
+        return reinterpret_cast<RawObject**>(&ptr()->url_);
+      case Snapshot::kCore:
+      case Snapshot::kAppWithJIT:
+      case Snapshot::kScript:
+        return reinterpret_cast<RawObject**>(&ptr()->tokens_);
+      case Snapshot::kMessage:
+        break;
+    }
+    UNREACHABLE();
+    return NULL;
+  }
 
   int32_t line_offset_;
   int32_t col_offset_;