* Remove reference to removed dir 'third_party/rust_crates'.
* Remove reference to unused environment variable 'DENO_NINJA_PATH'.
* Remove helper functions 'root()' and 'tp()'.
* Move definition of 'third_party_path' to build.py.
* Move definition of 'gn_exe()' to setup.py.
* Move 'download_sccache()' and 'download_hyperfine()' from prebuilt.py
to third_party.py, and delete prebuilt.py.
* Add helper function 'get_platform_dir_name()' to locate the
platform-specific 'v8/buildtools/<platform>' and
'prebuilt/<platform>' directories.
* Add helper function 'get_prebuilt_tool_path()' that returns the full
path to a platform-specific executable in //prebuilt.
* Cosmetic improvements.
//build was updated and our patch rebased:
https://github.com/denoland/chromium_build/tree/20190910_win_clang_depfile
V8 has removed the binaries third_party/v8/buildtools/*/gn.sha1 and started
using CIPD. In this patch, I've hacked in the original .sha1 files and continue to
use download_from_google_storage instead of the new CIPD. This will be fixed
in later work.
This fixes an issue on Windows that causes build to fails when
fix_symlinks() is called concurrently with another build step.
It is also no longer necessary, since recent versions of git know how to
properly create symbolic links on checkout.
* Make sync_third_party work in general
* Un-break build.py and run_hooks.py on windows
* Partially fix format.py on windows
* Reduce code duplication between run_hooks and sync_third_party
