Infrastructure for reading V8's initial snapshot from external files

net/tools/tld_cleanup/tld_cleanup.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This command-line program converts an effective-TLD data file in UTF-8 from
 // the format provided by Mozilla to the format expected by Chrome.  This
 // program generates an intermediate file which is then used by gperf to
 // generate a perfect hash map.  The benefit of this approach is that no time is
 // spent on program initialization to generate the map of this data.
 //
@@ skipping 10 matching lines @@
 //  * Logs a warning if GURL reports a rule as invalid, but keeps the rule.
 //  * Canonicalizes each rule's domain by converting it to a GURL and back.
 //  * Adds explicit rules for true TLDs found in any rule.
 //  * Marks entries in the file between "// ===BEGIN PRIVATE DOMAINS==="
 //    and "// ===END PRIVATE DOMAINS===" as private.
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+#include "gin/public/isolate_holder.h"
+#endif // V8_USE_EXTERNAL_STARTUP_DATA
 #include "base/i18n/icu_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/process/memory.h"
 #include "net/tools/tld_cleanup/tld_cleanup_util.h"
 
 int main(int argc, const char* argv[]) {
   base::EnableTerminationOnHeapCorruption();
   if (argc != 1) {
     fprintf(stderr, "Normalizes and verifies UTF-8 TLD data files\n");
@@ skipping 18 matching lines @@
   PathService::Get(base::DIR_EXE, &log_filename);
   log_filename = log_filename.AppendASCII("tld_cleanup.log");
   logging::LoggingSettings settings;
   settings.logging_dest = destination;
   settings.log_file = log_filename.value().c_str();
   settings.delete_old = logging::DELETE_OLD_LOG_FILE;
   logging::InitLogging(settings);
 
   base::i18n::InitializeICU();
 
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+  gin::IsolateHolder::LoadV8Snapshot();
+#endif // V8_USE_EXTERNAL_STARTUP_DATA
+
   base::FilePath input_file;
   PathService::Get(base::DIR_SOURCE_ROOT, &input_file);
   input_file = input_file.Append(FILE_PATH_LITERAL("net"))
                          .Append(FILE_PATH_LITERAL("base"))
                          .Append(FILE_PATH_LITERAL(
                              "registry_controlled_domains"))
                          .Append(FILE_PATH_LITERAL("effective_tld_names.dat"));
   base::FilePath output_file;
   PathService::Get(base::DIR_SOURCE_ROOT, &output_file);
   output_file = output_file.Append(FILE_PATH_LITERAL("net"))
                            .Append(FILE_PATH_LITERAL("base"))
                            .Append(FILE_PATH_LITERAL(
                                "registry_controlled_domains"))
                            .Append(FILE_PATH_LITERAL(
                                "effective_tld_names.gperf"));
   net::tld_cleanup::NormalizeResult result =
       net::tld_cleanup::NormalizeFile(input_file, output_file);
   if (result != net::tld_cleanup::kSuccess) {
     fprintf(stderr,
             "Errors or warnings processing file.  See log in tld_cleanup.log.");
   }
 
   if (result == net::tld_cleanup::kError)
     return 1;
   return 0;
 }