Revert "Roll GN from r1496 (0790d304) to r1546 (b85982b3)"

This reverts commit a10dd1dc6898c6459b7cb61f913f3772948c4b53.

Reason for revert: The newer GN seems to be computing runtime_deps wrong; see https://crbug.com/skia/8935.

Original change's description:
> Roll GN from r1496 (0790d304) to r1546 (b85982b3)
>
> Now that we can use CIPD to install GN binaries, we can finally
> roll GN and catch up w/ multiple months of changes :)
>
>     https://gn.googlesource.com/gn.git/+log/0790d304..b85982b
>
>     b85982b3 visual_studio_writer: Make OutDir equal to $(SolutionDir).
>     9434c3d2 Make gen.py compatible with python3
>     b199e54b [docs] : Split 'gn help' heading and usage summary when exceed 80 cols
>     5bc90b63 stdout: use dim colors
>     24411bec Make gn check faster
>     3941394b [docs] regenerate docs/reference.md
>     93ac4e04 Some documentation of gn check --check-generated
>     fd1532f2 [docs] Fix Markdown format missing `
>     74657a61 Add gn check --check-generated to check dependencies of generated files
>     6b943827 Fixed typo (missing parenthesis) in get_path_info documentation
>     d062e74f Improve config documentation.
>     e15f243a gen.py: Pass -pthread, not -lpthread, in ldflags.
>     013513c9 gn recipe: Do not pass libraries in LDFLAGS in the Linux recipe
>     1152229e gen.py: Pass -pthread via ldflags, not libs
>     01237e9c Remove references to ARM-optimized math implementation
>     0ac93dd2 For proper order put -lpthreads as a 'library' not a 'linker flag'
>     1ab6fa2c Attempt to unbreak build with MSVC 15.8.4
>     082fbe39 Pass -lpthread when linking instead of -pthread
>     d69a9c37 [help] Fixing help issues.
>     04685d69 Add --dump-json-tree option for format subcommand.
>     57586fdb Suppress warning on VS2017.
>     4dcd2776 Port to FreeBSD.
>     5519dc2f Reintroduce the ICF flag, turn it on for bots
>     53107bfc [infra] Update XCode version
>     377ad041 Enable LTO for release builds
>     282a428c Disable ICF on Darwin, make it default for Release
>     71b537ce [format] Extend `gn format` to take a list of files.
>     b5a2ac6e Improve help output.
>     d837047a format: Ensure that formatting always reaches a fixedpoint in one run
>     8ed01d3b Docs: regenerate docs
>     d84a862e More efficient Value implementation.
>     bcfb6471 cleanup label_ptr.h
>     88bd8a8d build/gen.py: Add --no-strip option.
>     894143c3 format: Fix incorrect dewrap of `if`
>     45314e29 [metadata] Return metadata in postorder.
>     e49432fa [metadata] Actually collect the metadata
>     c1780c21 [metadata] Allow specification of rebase dir
>     5a9e0a2c [metadata] Adding metadata vars to write_data target
>     d021d391 [metadata] Add generated_file target type
>     27b66b57 Allow whitespace in include directives.
>     c6841d31 Fix a crash on invalid on `not_needed(scope)` without a 2nd argument.
>     54be6f11 Allow NOSORT to be the last line in a comment in addition to the first.
>     a07831bb [metadata] Adding `meta` command
>     0587778f [metadata] Walk function
>     96c77296 [metadata] Add metadata walk to target
>     a27e8dc0 [metadata] Adding basic metadata walking
>     2000587b [metadata] Adding metadata output to gn desc
>     0e1b8843 [metadata] Adding metadata variable to target
>     ecc95221 Add links to the "Using GN build" presentation.
>     13ac6ca4 Test that not_needed works with forward_variables_from
>
> Change-Id: I8db493df2a27c9b8ffe066a11179ffedb2b0f47a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1522549
> Commit-Queue: Dirk Pranke <dpranke@chromium.org>
> Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#645379}

TBR=dpranke@chromium.org,tikuta@chromium.org
Bug: skia:8935

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I9fc9b5fbdd7b597fd775bfdbf22ca46ef5c45ebc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1546617
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#646017}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 3c8695a9f295da1c7f17333e017559189f9e2112
1 file changed