Update from https://crrev.com/327068

base/trace_event/malloc_dump_provider.h

Index: base/trace_event/malloc_dump_provider.h
diff --git a/base/trace_event/malloc_dump_provider.h b/base/trace_event/malloc_dump_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..b6f697363a0080fb121d8725a6085160bb456f48
--- /dev/null
+++ b/base/trace_event/malloc_dump_provider.h
@@ -0,0 +1,37 @@
+// Copyright 2015 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.
+
+#ifndef BASE_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_
+#define BASE_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_
+
+#include <istream>
+
+#include "base/memory/singleton.h"
+#include "base/trace_event/memory_dump_provider.h"
+
+namespace base {
+namespace trace_event {
+
+// Dump provider which collects process-wide memory stats.
+class BASE_EXPORT MallocDumpProvider : public MemoryDumpProvider {
+ public:
+  static MallocDumpProvider* GetInstance();
+
+  // MemoryDumpProvider implementation.
+  bool DumpInto(ProcessMemoryDump* pmd) override;
+  const char* GetFriendlyName() const override;
+
+ private:
+  friend struct DefaultSingletonTraits<MallocDumpProvider>;
+
+  MallocDumpProvider();
+  ~MallocDumpProvider() override;
+
+  DISALLOW_COPY_AND_ASSIGN(MallocDumpProvider);
+};
+
+}  // namespace trace_event
+}  // namespace base
+
+#endif  // BASE_TRACE_EVENT_MALLOC_DUMP_PROVIDER_H_