Merge changes I77bac2ca,I9715c850,I170b87c1,I744ad9de,I3d25bd02 into idea133

* changes:
  android/base/files/PathUtils.h: add new header.
  android/base/EintrWrapper.h: EINTR handling C++ helper.
  android/base/memory/ScopedPtr.h: new helper class.
  android/base/StringView.h: Another C++ helper class.
  android/base/Log.h: Add C++ Logging helper class.