Refactor snapshots pieces to include a section for loading instructions into the heap of a regular …

runtime/vm/unit_test.h

Index: runtime/vm/unit_test.h
diff --git a/runtime/vm/unit_test.h b/runtime/vm/unit_test.h
index 0557c40b21a659ac751895ee2f85766764e7e71c..945fd6e8378b88ed8045a6672439cfc73e770a68 100644
--- a/runtime/vm/unit_test.h
+++ b/runtime/vm/unit_test.h
@@ -242,13 +242,11 @@ class VirtualMemory;
 
 
 namespace bin {
-// vm_isolate_snapshot_buffer points to a snapshot for the vm isolate if we
-// link in a snapshot otherwise it is initialized to NULL.
-extern const uint8_t* vm_isolate_snapshot_buffer;
-
-// isolate_snapshot_buffer points to a snapshot for an isolate if we link in a
-// snapshot otherwise it is initialized to NULL.
-extern const uint8_t* core_isolate_snapshot_buffer;
+// Snapshot pieces if we link in a snapshot, otherwise initialized to NULL.
+extern const uint8_t* vm_snapshot_data;
+extern const uint8_t* vm_snapshot_instructions;
+extern const uint8_t* core_isolate_snapshot_data;
+extern const uint8_t* core_isolate_snapshot_instructions;
 }
 
 
@@ -296,7 +294,7 @@ class TestCase : TestCaseBase {
     return CreateIsolate(buffer, name);
   }
   static Dart_Isolate CreateTestIsolate(const char* name = NULL) {
-    return CreateIsolate(bin::core_isolate_snapshot_buffer, name);
+    return CreateIsolate(bin::core_isolate_snapshot_data, name);
   }
   static Dart_Handle library_handler(Dart_LibraryTag tag,
                                      Dart_Handle library,