Migrates battery_status from content/renderer/ to WebKit/platform/

third_party/WebKit/Source/platform/base/Bind.h

+// Copyright 2016 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 Bind_h
+#define Bind_h
+
+#include "base/bind.h"
+
+// This file provides limited access to base::Bind() function. base::Bind()
+// could be dangerous if it's used across threads, so we don't want to allow
+// general use of base::Bind().
+// See also "platform/ThreadSafeFunctional.h".
+
+namespace blink {
+
+// Binds an instance of a class to its member function. Does not bind anything
+// else.
+template<typename Class, typename ReturnType, typename... Args>
+auto bindInstanceToMethod(ReturnType (Class::*method)(Args...), Class* instance)
+    -> decltype(base::Bind(method, base::Unretained(instance)))
+{
+    return base::Bind(method, base::Unretained(instance));
+}
+
+} // namespace blink
+
+#endif // Bind_h