Revert of components/metrics: Add runtime memory leak detector

components/metrics/leak_detector/leak_detector_value_type.h

Index: components/metrics/leak_detector/leak_detector_value_type.h
diff --git a/components/metrics/leak_detector/leak_detector_value_type.h b/components/metrics/leak_detector/leak_detector_value_type.h
deleted file mode 100644
index 40f61081e9ae61b4dcd9b04a7ce41438062f0062..0000000000000000000000000000000000000000
--- a/components/metrics/leak_detector/leak_detector_value_type.h
+++ /dev/null
@@ -1,52 +0,0 @@
-// 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 COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_VALUE_TYPE_
-#define COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_VALUE_TYPE_
-
-#include <stddef.h>
-#include <stdint.h>
-
-namespace metrics {
-namespace leak_detector {
-
-// Used for tracking unique call stacks.
-// Not thread-safe.
-struct CallStack;
-
-class LeakDetectorValueType {
- public:
-  // Supported types.
-  enum Type {
-    TYPE_NONE,
-    TYPE_SIZE,
-    TYPE_CALL_STACK,
-  };
-
-  LeakDetectorValueType() : type_(TYPE_NONE), size_(0), call_stack_(nullptr) {}
-  explicit LeakDetectorValueType(size_t size)
-      : type_(TYPE_SIZE), size_(size), call_stack_(nullptr) {}
-  explicit LeakDetectorValueType(const CallStack* call_stack)
-      : type_(TYPE_CALL_STACK), size_(0), call_stack_(call_stack) {}
-
-  // Accessors.
-  Type type() const { return type_; }
-  size_t size() const { return size_; }
-  const CallStack* call_stack() const { return call_stack_; }
-
-  // Comparators.
-  bool operator==(const LeakDetectorValueType& other) const;
-  bool operator<(const LeakDetectorValueType& other) const;
-
- private:
-  Type type_;
-
-  size_t size_;
-  const CallStack* call_stack_;
-};
-
-}  // namespace leak_detector
-}  // namespace metrics
-
-#endif  // COMPONENTS_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_VALUE_TYPE_