Add LINKER_INITIALIZER marker to MemoryMappedFile::Region::kWholeFile

This is a follow-up to crrev.com/394313002. const initializers which
rely on the linker zero-initialization should use the LINKER_INITIALIZER
ctor for documentation purposes.
More discussion about this in the linked CL.

BUG=394502

Review URL: https://codereview.chromium.org/428883012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@286423 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 815b905d84cd1305bdc5dcd251752373b10f3e25
2 files changed
tree: 0c14f85ddf019c71c1be7356c8a85180029cf5a9
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/