Reland "ARM64 capable toolchain hash"

This is a reland of dd8c7b26

Original change's description:
> ARM64 capable toolchain hash
>
> This updates Chrome to build with a toolchain based on VS 2017 15.9.3
> and the Windows 10.0.17763.132 SDK, with the ARM64 components included to
> support building for ARM64 for Win32. This adds about 400 MB to the package
> size, a bit less than a 50% increase.
>
> Packaging was done on a Windows Server 2016 VM, cleanly created for this
> purpose.
>
> The package was created by downloading VS 2017 Update 9.3, from
> https://www.visualstudio.com/vs/, and then running the installer like this:
>
> $ PATH_TO_INSTALLER.EXE ^
>     --add Microsoft.VisualStudio.Workload.NativeDesktop ^
>     --add Microsoft.VisualStudio.Component.VC.ATLMFC ^
>     --add Microsoft.VisualStudio.Component.VC.Tools.ARM64 ^
>     --add Microsoft.VisualStudio.Component.VC.MFC.ARM64 ^
>     --includeRecommended --passive
>
> Then Add or Remove Programs was used to modify the SDK to add the
> Debuggers package.
>
> Then the packaging script was run like this:
>
>   python depot_tools\win_toolchain\package_from_installed.py 2017 -w 10.0.17763.0
>
> This was tested on two VMs to ensure that the results are consistent.
>
> This should not significantly affect the x86 and x64 builds, although
> there may have been some STL and CRT changes that could cause changes.
>
> Bug: 893460
> Change-Id: I33dd5b915ffaf17f306d804f561d26bf82060b03
> Reviewed-on: https://chromium-review.googlesource.com/c/1342814
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Reviewed-by: Nico Weber <thakis@chromium.org>
> Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#616123}

Bug: 893460,915046
Change-Id: I1f4f8fb7f37785ba935ef698964fa87f9a91e313
Reviewed-on: https://chromium-review.googlesource.com/c/1377510Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#620001}

build/vs_toolchain.py

@@ -364,9 +364,8 @@ def _GetDesiredVsToolchainHashes():
   to build with."""
   env_version = GetVisualStudioVersion()
   if env_version == '2017':
-    # VS 2017 Update 7.1 (15.7.1) with 10.0.17134.12 SDK, rebuilt with
-    # dbghelp.dll fix.
-    toolchain_hash = '3bc0ec615cf20ee342f3bc29bc991b5ad66d8d2c'
+    # VS 2017 Update 9 (15.9.3) with 10.0.17763.132 SDK, with ARM64 libraries.
+    toolchain_hash = 'e04af53255fe13c130e9cfde7d9ac861b9fb674a'
     # Third parties that do not have access to the canonical toolchain can map
     # canonical toolchain version to their own toolchain versions.
     toolchain_hash_mapping_key = 'GYP_MSVS_HASH_%s' % toolchain_hash