Notification for battery with <= 15 minutes remaining.

BUG=521
TEST=none

Review URL: http://codereview.chromium.org/1079007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42153 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 54 insertions, 0 deletions

diff --git a/base/move.h b/base/move.h
new file mode 100644
index 0000000..eb66070
--- /dev/null
+++ b/base/move.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2010 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_MOVE_H_
+#define BASE_MOVE_H_
+
+#include <algorithm>
+
+namespace base {
+
+// The move function provides a functional form of swap to move a swappable
+// value leverage the compiler return value optimization and avoiding copy.
+//
+// The type being moved must have an efficient swap() and be default
+// contructable and copyable.
+//
+// C++0x will contain an std::move() function that makes use of rvalue
+// references to achieve the same result. When std::move() is available, it
+// can replace base::move().
+//
+// For example, the following code will not produce any copies of the string.
+//
+// std::string f() {
+//   std::string result("Hello World");
+//   return result;
+// }
+//
+// class Class {
+//  public:
+//   Class(std::string x)  // Pass sink argument by value
+//     : m_(move(x));  // Move x into m_
+//  private:
+//   std::string m_;
+// };
+//
+// int main() {
+//  Class x(f());  // the result string of f() is allocated as the temp argument
+//                 // to x() and then swapped into the member m_. No Strings
+//                 // are copied by this call.
+// ...
+
+template <typename T>  // T models Regular
+T move(T& x) {  // NOLINT : Non-const ref for standard library conformance
+  using std::swap;
+  T result;
+  swap(x, result);
+  return result;
+}
+
+}  // namespace base
+
+#endif  // BASE_MOVE_H_
+