Merged all PointerToId functions into TraceHelper::PointerToString.

third_party/WebKit/Source/platform/scheduler/base/trace_helper.h

Index: third_party/WebKit/Source/platform/scheduler/base/trace_helper.h
diff --git a/third_party/WebKit/Source/platform/scheduler/base/trace_helper.h b/third_party/WebKit/Source/platform/scheduler/base/trace_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..8f8fd265af352e61c0a2c888dbf1ae429d1dbb8e
--- /dev/null
+++ b/third_party/WebKit/Source/platform/scheduler/base/trace_helper.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TRACE_HELPER_H
+#define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TRACE_HELPER_H
+
+#include <string>
+
+namespace blink {
+namespace scheduler {
+
+namespace trace_helper {
+std::string PointerToString(const void* pointer);
+};
+
+}  // namespace scheduler
+}  // namespace blink
+
+#endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TRACE_HELPER_H