[snapshot] support including templates in the snapshot.

src/snapshot/partial-serializer.cc

 // Copyright 2016 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/snapshot/partial-serializer.h"
 #include "src/snapshot/startup-serializer.h"
 
 #include "src/objects-inl.h"
 
 namespace v8 {
@@ skipping 56 matching lines @@
     return;
   }
 
   // Pointers from the partial snapshot to the objects in the startup snapshot
   // should go through the root array or through the partial snapshot cache.
   // If this is not the case you may have to add something to the root array.
   DCHECK(!startup_serializer_->reference_map()->Lookup(obj).is_valid());
   // All the internalized strings that the partial snapshot needs should be
   // either in the root table or in the partial snapshot cache.
   DCHECK(!obj->IsInternalizedString());
+  // Function and object templates are not context specific.
+  DCHECK(!obj->IsTemplateInfo());
 
   if (SerializeKnownObject(obj, how_to_code, where_to_point, skip)) return;
 
   FlushSkip(skip);
 
   // Clear literal boilerplates.
   if (obj->IsJSFunction()) {
     LiteralsArray* literals = JSFunction::cast(obj)->literals();
     for (int i = 0; i < literals->literals_count(); i++) {
       literals->set_literal_undefined(i);
@@ skipping 12 matching lines @@
   // would cause dupes.
   DCHECK(!o->IsScript());
   return o->IsName() || o->IsSharedFunctionInfo() || o->IsHeapNumber() ||
          o->IsCode() || o->IsScopeInfo() || o->IsAccessorInfo() ||
          o->map() ==
              startup_serializer_->isolate()->heap()->fixed_cow_array_map();
 }
 
 }  // namespace internal
 }  // namespace v8