Reland "Add third_party/qemu-linux-arm64 to DEPS runhooks."

This is a reland of 8db01995
after fixing https://b.corp.google.com/issues/143701391

It adds the parentheses changes from
https://chromium-review.googlesource.com/c/chromium/src/+/1893190

Original change's description:
> Add third_party/qemu-linux-arm64 to DEPS runhooks.
>
> qemu-linux-arm64 is from the /fuchsia/qemu/linux-arm64 CIPD package.
>
> Bug: 1015177
> Change-Id: Ie193d18e4b52059ad853cee07075979b1faea038
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865751
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
> Commit-Queue: Stephen Roe <steveroe@google.com>
> Cr-Commit-Position: refs/heads/master@{#708478}

Bug: 1015177
Change-Id: I27c848336a3466ef2aa2801d29b7b850fd0411d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913570
Auto-Submit: Stephen Roe <steveroe@google.com>
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714972}

DEPS

@@ -122,6 +122,10 @@ vars = {
   # Wildcards are supported (e.g. "qemu.*").
   'checkout_fuchsia_boot_images': "qemu.x64,qemu.arm64",
 
+  # By default, do not check out files required to run fuchsia tests in
+  # qemu on linux-arm64 machines.
+  'checkout_fuchsia_for_arm64_host': False,
+
   # By Default, do not checkout AEMU, as it is too big. This can be overridden
   # e.g. with custom_vars.
   # TODO(chonggu): Delete once AEMU package is small enough.
@@ -941,6 +945,19 @@ deps = {
       'condition': 'checkout_linux',
   },
 
+  # TODO(steveroe): Get this from GCS instead of CIPD once the arm64 sdk is
+  # released using the same version specified in build/fuchsia/linux.sdk.sha1.
+  'src/third_party/fuchsia-sdk-arm64': {
+      'packages': [
+          {
+              'package': 'fuchsia/sdk/core/linux-arm64',
+              'version': 'J4QyYSv0T-30YSgD6d34XHRpck2ckNh-4MMhsRYj4zoC'
+          },
+      ],
+      'condition': 'host_os == "linux" and (checkout_fuchsia and checkout_fuchsia_for_arm64_host)',
+      'dep_type': 'cipd',
+  },
+
   'src/third_party/grpc/src': {
       'url': Var('chromium_git') + '/external/github.com/grpc/grpc.git' + '@' + '74b981a6a3d9ba17f3acae1d72b9109325ef656d',
   },
@@ -1335,6 +1352,17 @@ deps = {
   'src/third_party/pywebsocket/src':
     Var('chromium_git') + '/external/github.com/google/pywebsocket.git' + '@' + '2d7b73c3acbd0f41dcab487ae5c97c6feae06ce2',
 
+  'src/third_party/qemu-linux-arm64': {
+      'packages': [
+          {
+              'package': 'fuchsia/qemu/linux-arm64',
+              'version': 'b1b61a39e3ab0935cd030f27e01740578b04b967'
+          },
+      ],
+      'condition': 'host_os == "linux" and (checkout_fuchsia and checkout_fuchsia_for_arm64_host)',
+      'dep_type': 'cipd',
+  },
+
   'src/third_party/qemu-linux-x64': {
       'packages': [
           {

third_party/.gitignore

@@ -84,6 +84,7 @@
 /freetype/src
 /fuchsia-sdk/images
 /fuchsia-sdk/sdk
+/fuchsia-sdk-arm64
 /gestures/gestures
 /gles2_conform
 /glfw/src
@@ -194,6 +195,7 @@
 /python_26
 /pywebsocket/src
 /pywebsocket/src
+/qemu-linux-arm64
 /qemu-linux-x64
 /qemu-mac-x64
 /quic_trace/src