deps: update V8 to 5.4.500.27

Pick up latest commit from the 5.4-lkgr branch.

deps: edit V8 gitignore to allow trace event copy
deps: update V8 trace event to 315bf1e2d45be7d53346c31cfcc37424a32c30c8
deps: edit V8 gitignore to allow gtest_prod.h copy
deps: update V8 gtest to 6f8a66431cb592dad629028a50b3dd418a408c87

PR-URL: #8317
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

deps/v8/.gitignore

@@ -40,15 +40,13 @@ gcsuspects
 shell
 shell_g
 /_*
-/build/Debug
-/build/gyp
-/build/ipch
-/build/Release
-/build/win_toolchain.json
+/build
+/gypfiles/win_toolchain.json
 /buildtools
 /hydrogen.cfg
 /obj
 /out
+/out.gn
 /perf.data
 /perf.data.old
 /test/benchmarks/data
@@ -59,20 +57,35 @@ shell_g
 /test/simdjs/data
 /test/test262/data
 /test/test262/data.tar
+/test/test262/harness
 /testing/gmock
-/testing/gtest
+/testing/gtest/*
+!/testing/gtest/include
+/testing/gtest/include/*
+!/testing/gtest/include/gtest
+/testing/gtest/include/gtest/*
+!/testing/gtest/include/gtest/gtest_prod.h
 /third_party
+/third_party/android_tools
+/third_party/cygwin
 /third_party/icu
+/third_party/instrumented_libraries
+/third_party/inspector_protocol
+/third_party/jinga2
 /third_party/llvm
 /third_party/llvm-build
+/third_party/markupsafe
+/third_party/WebKit
 /tools/clang
 /tools/gcmole/gcmole-tools
 /tools/gcmole/gcmole-tools.tar.gz
+/tools/gyp
 /tools/jsfunfuzz/jsfunfuzz
 /tools/jsfunfuzz/jsfunfuzz.tar.gz
 /tools/luci-go/linux64/isolate
 /tools/luci-go/mac64/isolate
 /tools/luci-go/win64/isolate.exe
+/tools/mb
 /tools/oom_dump/oom_dump
 /tools/oom_dump/oom_dump.o
 /tools/swarming_client
@@ -86,7 +99,9 @@ GTAGS
 GRTAGS
 GSYMS
 GPATH
+tags
 gtags.files
 turbo*.cfg
 turbo*.dot
 turbo*.json
+v8.ignition_dispatches_table.json

deps/v8/.gn

@@ -0,0 +1,51 @@
+# This file is used by the GN meta build system to find the root of the source
+# tree and to set startup options. For documentation on the values set in this
+# file, run "gn help dotfile" at the command line.
+
+# The location of the build configuration file.
+buildconfig = "//build/config/BUILDCONFIG.gn"
+
+# The secondary source root is a parallel directory tree where
+# GN build files are placed when they can not be placed directly
+# in the source tree, e.g. for third party source trees.
+secondary_source = "//build/secondary/"
+
+# These are the targets to check headers for by default. The files in targets
+# matching these patterns (see "gn help label_pattern" for format) will have
+# their includes checked for proper dependencies when you run either
+# "gn check" or "gn gen --check".
+check_targets = [
+]
+
+# These are the list of GN files that run exec_script. This whitelist exists
+# to force additional review for new uses of exec_script, which is strongly
+# discouraged except for gypi_to_gn calls.
+exec_script_whitelist = [
+  "//build/config/android/BUILD.gn",
+  "//build/config/android/config.gni",
+  "//build/config/android/internal_rules.gni",
+  "//build/config/android/rules.gni",
+  "//build/config/BUILD.gn",
+  "//build/config/compiler/BUILD.gn",
+  "//build/config/gcc/gcc_version.gni",
+  "//build/config/ios/ios_sdk.gni",
+  "//build/config/linux/atk/BUILD.gn",
+  "//build/config/linux/BUILD.gn",
+  "//build/config/linux/pkg_config.gni",
+  "//build/config/mac/mac_sdk.gni",
+  "//build/config/posix/BUILD.gn",
+  "//build/config/sysroot.gni",
+  "//build/config/win/BUILD.gn",
+  "//build/config/win/visual_studio_version.gni",
+  "//build/gn_helpers.py",
+  "//build/gypi_to_gn.py",
+  "//build/toolchain/concurrent_links.gni",
+  "//build/toolchain/gcc_toolchain.gni",
+  "//build/toolchain/mac/BUILD.gn",
+  "//build/toolchain/win/BUILD.gn",
+  "//build/util/branding.gni",
+  "//build/util/version.gni",
+  "//test/cctest/BUILD.gn",
+  "//test/test262/BUILD.gn",
+  "//test/unittests/BUILD.gn",
+]

deps/v8/AUTHORS

@@ -40,6 +40,7 @@ Alexis Campailla <alexis@janeasystems.com>
 Andreas Anyuru <andreas.anyuru@gmail.com>
 Andrew Paprocki <andrew@ishiboo.com>
 Andrei Kashcha <anvaka@gmail.com>
+Anna Henningsen <addaleax@gmail.com>
 Bangfu Tao <bangfu.tao@samsung.com>
 Ben Noordhuis <info@bnoordhuis.nl>
 Benjamin Tan <demoneaux@gmail.com>
@@ -50,7 +51,9 @@ Craig Schlenter <craig.schlenter@gmail.com>
 Chris Nardi <hichris123@gmail.com>
 Christopher A. Taylor <chris@gameclosure.com>
 Daniel Andersson <kodandersson@gmail.com>
+Daniel Bevenius <daniel.bevenius@gmail.com>
 Daniel James <dnljms@gmail.com>
+Deon Dior <diaoyuanjie@gmail.com>
 Douglas Crosher <dtc-v8@scieneer.com>
 Dusan Milosavljevic <dusan.m.milosavljevic@gmail.com>
 Erich Ocean <erich.ocean@me.com>
@@ -62,6 +65,7 @@ Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
 Geoffrey Garside <ggarside@gmail.com>
 Han Choongwoo <cwhan.tunz@gmail.com>
 Hirofumi Mako <mkhrfm@gmail.com>
+Honggyu Kim <honggyu.kp@gmail.com>
 Ioseb Dzmanashvili <ioseb.dzmanashvili@gmail.com>
 Isiah Meadows <impinball@gmail.com>
 Jan de Mooij <jandemooij@gmail.com>
@@ -85,11 +89,13 @@ Matthew Sporleder <msporleder@gmail.com>
 Maxim Mossienko <maxim.mossienko@gmail.com>
 Michael Lutz <michi@icosahedron.de>
 Michael Smith <mike@w3.org>
+Michaël Zasso <mic.besace@gmail.com>
 Mike Gilbert <floppymaster@gmail.com>
 Mike Pennisi <mike@mikepennisi.com>
 Milton Chiang <milton.chiang@mediatek.com>
 Myeong-bo Shim <m0609.shim@samsung.com>
 Nicolas Antonius Ernst Leopold Maria Kaiser <nikai@nikai.net>
+Oleksandr Chekhovskyi <oleksandr.chekhovskyi@gmail.com>
 Paolo Giarrusso <p.giarrusso@gmail.com>
 Patrick Gansterer <paroga@paroga.com>
 Peter Varga <pvarga@inf.u-szeged.hu>
@@ -113,4 +119,4 @@ Vladimir Shutoff <vovan@shutoff.ru>
 Yu Yin <xwafish@gmail.com>
 Zac Hansen <xaxxon@gmail.com>
 Zhongping Wang <kewpie.w.zp@gmail.com>
-柳荣一 <admin@web-tinker.com>
+柳荣一 <admin@web-tinker.com>