refactor: rename the atom directory to shell

shell/common/heap_snapshot.cc

@@ -0,0 +1,56 @@
+// Copyright (c) 2018 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/common/heap_snapshot.h"
+
+#include "v8/include/v8-profiler.h"
+
+namespace {
+
+class HeapSnapshotOutputStream : public v8::OutputStream {
+ public:
+  explicit HeapSnapshotOutputStream(base::File* file) : file_(file) {
+    DCHECK(file_);
+  }
+
+  bool IsComplete() const { return is_complete_; }
+
+  // v8::OutputStream
+  int GetChunkSize() override { return 65536; }
+  void EndOfStream() override { is_complete_ = true; }
+
+  v8::OutputStream::WriteResult WriteAsciiChunk(char* data, int size) override {
+    auto bytes_written = file_->WriteAtCurrentPos(data, size);
+    return bytes_written == size ? kContinue : kAbort;
+  }
+
+ private:
+  base::File* file_ = nullptr;
+  bool is_complete_ = false;
+};
+
+}  // namespace
+
+namespace atom {
+
+bool TakeHeapSnapshot(v8::Isolate* isolate, base::File* file) {
+  DCHECK(isolate);
+  DCHECK(file);
+
+  if (!file->IsValid())
+    return false;
+
+  auto* snapshot = isolate->GetHeapProfiler()->TakeHeapSnapshot();
+  if (!snapshot)
+    return false;
+
+  HeapSnapshotOutputStream stream(file);
+  snapshot->Serialize(&stream, v8::HeapSnapshot::kJSON);
+
+  const_cast<v8::HeapSnapshot*>(snapshot)->Delete();
+
+  return stream.IsComplete();
+}
+
+}  // namespace atom