Update DEPS for buildtools and GYP

Point buildtools to its new location and update it to 3e50219fc450.

https://chromium.googlesource.com/chromium/buildtools:

437a616be5b2 Roll doclava from Android version 6.0.0 to 8.1.0
e514b423cd41 Remove libunwind arm dependency from libc++abi
d8b13809dced Build libc++abi with LIBCXXABI_SILENT_TERMINATE set
dd61138d2390 Add libunwind include path to libunwind config
a2cbf26d9ed3 Roll lib{cxx,cxxabi,unwind}
95d2a25d1de9 Roll gn 5478ca083b..c67646fb60 (r528993:r531988)
cac097d5c2b8 Roll lib{cxx,cxxabi,unwind}
f115f4786771 Revert "Roll gn 5478ca083b..c67646fb60 (r528993:r531988)"
2637e7e91152 Roll gn 5478ca083b..a0a05a85c5 (r528993:r533513)
053f96910491 Add Windows support to libc++ target
a09e064635a4 Merge "Add Windows support to libc++ target."
2888931260f2 checkdeps: Add "noparent" support, similar to OWNERS files
3748a2a90871 Roll gn a0a05a85c5..ee966518c2 (r533513:r544233)
10d701fce52d Prepare for |is_posix| switch in the Fuchsia build
ce837ab781da Roll lib{c++,c++abi,unwind}
c81e25593ef4 [CFI] Update libc++abi to include cfi-icall fix
4c8aa3ad4fd3 Roll gn ee966518c2..b709e226c5 (r544233:r549249)
e8aa02ea839e Merge "Roll gn ee966518c2..b709e226c5 (r544233:r549249)"
8febfea9bc7e Move SVN revision comments to be variables in a gni file
ab7b6a7b350d Roll gn b709e226c5..76b9b6c759 (r549249:r552354)
b7d53a93026d Make libc++abi C++17 ready
50bedd71e73c Roll gn 76b9b6c759..8b9e025d4d (r552354:r554932)
0b71401b977f Roll gn 8b9e025d4d..0fbf0789d9 (r554932:r555198)
292896eef97e Roll libc++abi 52c7a376..05a73941
ae5162d61ffc Remove unnecessary android_crazy_linker dependency from
             libc++abi
c2fb17cecaf9 Correctly configure __cxa_demangle visibility
a9e946f166b7 Exclude libc++abi target when use_custom_libcxx=false
e7546473ac90 Move extern-C before __attribute__ declarations
e0b3d0a72133 Roll gn 0fbf0789d9..ccbeab673a (r555198:r558753)
8ca403ab93e0 Merge "Move extern-C before __attribute__ declarations"
4cbff1e40ea6 Roll lib{cxx,unwind} to ToT
94288c26d2ff Revert "Roll gn 0fbf0789d9..ccbeab673a (r555198:r558753)"
893eb86b02b2 Set no_default_deps in shared libc++ builds
6f4dae280c6a Roll gn 0fbf0789d9..84176d72a4 (r555198:r564007)
5941c1b3df96 Roll gn 84176d72a4..a3bcd204a1 (r564007:r567268)
9c9fd97928dd Roll gn a3bcd204a1..7f29218b23 (r567268:r570036)
f45682622e92 Remove GN from buildtools
506ae1c73670 Add gn-has-moved binary in old gn location
49b054d87c53 Remove libcpp_is_static
aec56e26079f Roll to gn from gn.googlesource.com
2568b85b1fa9 Merge "Remove libcpp_is_static"
66c7d9dc3c26 Re-add .gitignore for GN
a57c8cf55208 Merge "Re-add .gitignore for GN"
7876a3a2adc9 Revert "Remove libcpp_is_static"
0dd5c6f980d2 Merge "Revert "Remove libcpp_is_static""
4ae75c1f8188 Add components/tracing in visibility for libunwind
637716e67c05 Remove libcpp_is_static
5a265b45c14c Merge "Remove libcpp_is_static"
691bfec9d73b Only set is_component_build if !is_component_build
9a90d9aaadeb Use new export_libcxxabi_from_executables variable
2dff9c9c74e9 Roll GN from "UNKNOWN" to 1413 (4cf8d15..e134e49)
13a00f110ef9 Roll lib{cxx,cxxabi,unwind}
fdce2ad26b26 Roll libcxx{abi}
24ebce457874 Update clang-format binaries and scripts for all platforms
da9b2941cbf6 Revert "Roll libcxx{abi}
04161ec8d7c7 Roll gn to version 1496 (0790d304)
7d88270de197 Added statically linked linux binary for clang-format
b07ce09e6870 Roll lib{c++,c++abi,unwind}
5cce74c6ae2e Roll libc++
93e021048e8a Add thomasanderson and thakis to libc++{abi} OWNERS
0e1cbc4eab68 Stop removing hide_all_but_jni_onload config from libc++
9d61cbb94fd6 Make libc++ a shared library on Android sanitizer builds
40194ab03962 Do TODOs related to Android/libc++
2f02e1f363b1 Don't export operator new/delete on Mac
6fbda1b24c18 Add eu-strip to buildtools/third_party/
d658e92a1fc2 Delete buildtools

https://chromium.googlesource.com/chromium/src/buildtools:

6b05562fca00 [buildtools] add owners
97f503c698ae Update libcxx{abi}
daac513c763a Fixes necessary for enabling libc++ on Windows
3e50219fc450 Fix mac/component/asan builds

Update GYP to 8bee09f4a578.

52d9dcea6525 Add prototype of Travis config
85a2192070ba
ac24c9a9501e osx
6dbd6e1ed2ad
2f9ae921f899 add copyright to .sh
2ea7773b5a97 set +x  on buildbot/travis-checkout.sh
834a0592ddee fiddling with directories
c3b797d883df try exporting PATH and only build ninja for now
541da5393710 try other order for sync:
39ad9f30379c see if ninja is getting pulled
007db9efe490 see if ninja is getting pulled
0afd3fc18f12 try a wrapper script
7f2941039abf readd osx
d22dd9717aeb and try clang
deb62526ffbb Disable some tests that fail on bots to try to get a green
             build
4d467626b0b9 Make Travis build only the master branch
81286d388abf infra: remove cq.cfg, which is no longer used
197c82b78bc8 Patch GYP so that building with Xcode 10 works
f825c98e4bff Fix issue with missing resources in Xcode ui tests targets
6dbf304b77cb Add a copyright header to TestCmd.py
9df93ee4302e Make Visual Studio 2017 Community Edition work w/ GYP
f989ef9f1c41 Use ast module instead of compiler module for parsing files
f2dca32f7856 Update simple_copy.py for Python3 types
ab4aca868d68 Mostly mechanical changes for Python3 support
732bde62a5eb Fix one dangling utf8 decode call needed for python 3
e22714e51525 Fixes needed for Python3 on Win32
703706c4995b src,win: add VS2019 version
bd11dd1c51ef More miscellaneous fixes for Python3 compatibility
8bee09f4a578 Changes for windows and easy xml to get gyp to run under
             python 3

Change-Id: I7a0dc6638d275728aec2bd30c07b11492573d1e3
Reviewed-on: https://chromium-review.googlesource.com/c/1496661
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>

DEPS

@@ -20,14 +20,14 @@ vars = {
 
 deps = {
   'buildtools':
-      Var('chromium_git') + '/chromium/buildtools.git@' +
-      '6fe4a3251488f7af86d64fc25cf442e817cf6133',
+      Var('chromium_git') + '/chromium/src/buildtools.git@' +
+      '3e50219fc4503f461b2176a9976891b28d80f9ab',
   'crashpad/third_party/gtest/gtest':
       Var('chromium_git') + '/external/github.com/google/googletest@' +
       '9518a57428ae0a7ed450c1361768e84a2a38af5a',
   'crashpad/third_party/gyp/gyp':
       Var('chromium_git') + '/external/gyp@' +
-      '5e2b3ddde7cda5eb6bc09a5546a76b00e49d888f',
+      '8bee09f4a57807136593ddc906b0b213c21f9014',
   'crashpad/third_party/mini_chromium/mini_chromium':
       Var('chromium_git') + '/chromium/mini_chromium@' +
       '737433ebade4d446643c6c07daae02a67e8decca',