GitLab

No change to logic, only docs.

This fixes several mistakes in the java_cpp_strings docs:
 * Do not need GENERATED_JAVA_PACKAGE
 * {NATIVE_STRINGS}, not {NATIVE_SWITCHES}
 * Do not need "This file is autogenerated..." boilerplate in the
   template
 * Consistent package name between template and generated file
 * Consistent class name between template and generated file
 * Change {YEAR} to $YEAR, as this must not be left templated, but
   should be filled in by the author

This also adds some more opinionated changes:
 * Mark the class as "public final" not "public abstract" and mark the
   constructor private, as this is a more robust way to mark the class
   as non-instantiable
 * Include the boilerplate "This following string constants..." [sic]
   message in the generated file, as that's what the script inserts.
 * Use more realistic file names (foo_switches.cc and FooSwitches.java).
 * Add javadoc for the template file, as a suggestion for others to
   document the generated class.

Bug: 1011991
Test: tools/md_browser/md_browser.py
Test: Upload to gerrit > open file > click "gitiles"
Change-Id: Ia1aa96cf50842bf226f35440fd2cafe8a186f8b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863866Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706456}