Reland of "Release streamed script resources after it was compiled"

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 2176 matching lines @@
   source->parser->HandleSourceURLComments(isolate, script);
 
   i::Handle<i::SharedFunctionInfo> result;
   if (source->info->literal() != nullptr) {
     // Parsing has succeeded.
     result = i::Compiler::GetSharedFunctionInfoForStreamedScript(
         script, source->info.get(), str->length());
   }
   has_pending_exception = result.is_null();
   if (has_pending_exception) isolate->ReportPendingMessages();
+
+  source->Release();
+
   RETURN_ON_FAILED_EXECUTION(Script);
 
-  source->info->clear_script();  // because script goes out of scope.
-
   Local<UnboundScript> generic = ToApiHandle<UnboundScript>(result);
   if (generic.IsEmpty()) return Local<Script>();
   Local<Script> bound = generic->BindToCurrentContext();
   if (bound.IsEmpty()) return Local<Script>();
   RETURN_ESCAPED(bound);
 }
 
 
 Local<Script> ScriptCompiler::Compile(Isolate* v8_isolate,
                                       StreamedSource* v8_source,
@@ skipping 6883 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8