[snapshot] encode resource before serializing.

src/bootstrapper.h

 // Copyright 2014 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.
 
 #ifndef V8_BOOTSTRAPPER_H_
 #define V8_BOOTSTRAPPER_H_
 
 #include "src/factory.h"
+#include "src/snapshot/natives.h"
 
 namespace v8 {
 namespace internal {
 
 // A SourceCodeCache uses a FixedArray to store pairs of
 // (OneByteString*, JSFunction*), mapping names of native code files
 // (runtime.js, etc.) to precompiled functions. Instead of mapping
 // names to functions it might make sense to let the JS2C tool
 // generate an index for each native JS file.
 class SourceCodeCache final BASE_EMBEDDED {
@@ skipping 70 matching lines @@
       MaybeHandle<JSGlobalProxy> maybe_global_proxy,
       v8::Local<v8::ObjectTemplate> global_object_template);
 
   // Detach the environment from its outer global object.
   void DetachGlobal(Handle<Context> env);
 
   // Traverses the pointers for memory management.
   void Iterate(ObjectVisitor* v);
 
   // Accessor for the native scripts source code.
-  template <class Source>
-  Handle<String> SourceLookup(int index);
+  Handle<String> GetNativeSource(NativeType type, int index);
 
   // Tells whether bootstrapping is active.
   bool IsActive() const { return nesting_ != 0; }
 
   // Support for thread preemption.
   static int ArchiveSpacePerThread();
   char* ArchiveState(char* to);
   char* RestoreState(char* from);
   void FreeThreadResources();
 
@@ skipping 45 matching lines @@
   ~BootstrapperActive() {
     --bootstrapper_->nesting_;
   }
 
  private:
   Bootstrapper* bootstrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(BootstrapperActive);
 };
 
-
-class NativesExternalStringResource final
-    : public v8::String::ExternalOneByteStringResource {
- public:
-  NativesExternalStringResource(const char* source, size_t length)
-      : data_(source), length_(length) {}
-  const char* data() const override { return data_; }
-  size_t length() const override { return length_; }
-
- private:
-  const char* data_;
-  size_t length_;
-};
-
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BOOTSTRAPPER_H_