Revert of [Bindings] Create and use V8 context snapshots

tools/v8_context_snapshot/v8_context_snapshot_generator.cc

Index: tools/v8_context_snapshot/v8_context_snapshot_generator.cc
diff --git a/tools/v8_context_snapshot/v8_context_snapshot_generator.cc b/tools/v8_context_snapshot/v8_context_snapshot_generator.cc
deleted file mode 100644
index 449a54633f709dd9a01adfd78066615b8dbd9f44..0000000000000000000000000000000000000000
--- a/tools/v8_context_snapshot/v8_context_snapshot_generator.cc
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2017 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.
-
-#include "base/at_exit.h"
-#include "base/command_line.h"
-#include "base/files/file_util.h"
-#include "base/message_loop/message_loop.h"
-#include "base/task_scheduler/task_scheduler.h"
-#include "gin/v8_initializer.h"
-#include "mojo/edk/embedder/embedder.h"
-#include "third_party/WebKit/public/platform/WebThread.h"
-#include "third_party/WebKit/public/web/WebKit.h"
-#include "third_party/WebKit/public/web/WebV8ContextSnapshot.h"
-#include "v8/include/v8.h"
-
-namespace {
-
-class SnapshotThread : public blink::WebThread {
- public:
-  bool IsCurrentThread() const override { return true; }
-  blink::WebScheduler* Scheduler() const override { return nullptr; }
-  blink::WebTaskRunner* GetWebTaskRunner() override { return nullptr; }
-};
-
-class SnapshotPlatform final : public blink::Platform {
- public:
-  bool IsTakingV8ContextSnapshot() override { return true; }
-  blink::WebThread* CurrentThread() override {
-    static SnapshotThread dummy_thread;
-    return &dummy_thread;
-  }
-};
-
-}  // namespace
-
-// This program takes a snapshot of V8 contexts and writes it out as a file.
-// The snapshot file is consumed by Blink.
-//
-// Usage:
-// % v8_context_snapshot_generator --output_file=<filename>
-int main(int argc, char** argv) {
-  base::AtExitManager at_exit;
-  base::CommandLine::Init(argc, argv);
-#ifdef V8_USE_EXTERNAL_STARTUP_DATA
-  gin::V8Initializer::LoadV8Snapshot();
-  gin::V8Initializer::LoadV8Natives();
-#endif
-
-  // Set up environment to make Blink and V8 workable.
-  base::MessageLoop message_loop;
-  base::TaskScheduler::CreateAndStartWithDefaultParams("TakeSnapshot");
-  mojo::edk::Init();
-
-  // Take a snapshot.
-  SnapshotPlatform platform;
-  blink::Initialize(&platform);
-  v8::StartupData blob = blink::WebV8ContextSnapshot::TakeSnapshot();
-
-  // Save the snapshot as a file. Filename is given in a command line option.
-  base::FilePath file_path =
-      base::CommandLine::ForCurrentProcess()->GetSwitchValuePath("output_file");
-  CHECK(!file_path.empty());
-  CHECK_LT(0, base::WriteFile(file_path, blob.data, blob.raw_size));
-
-  delete[] blob.data;
-
-  return 0;
-}