Checkout Linux sysroots using DEPS entrees instead of hooks

Switch to the method preferred by Chromium.

Change-Id: I073c1e897453ad8b25281017718e2c4622289b46
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/118958
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index 8679ff6..0638ff6 100644
--- a/DEPS
+++ b/DEPS
@@ -219,6 +219,7 @@
 
    # TODO(337061377): Move into a separate allowed gcs bucket list.
   'chromium-clang-format',
+  'chrome-linux-sysroot',
 ]
 
 deps = {
@@ -234,6 +235,90 @@
   'build':
     Var('chromium_git') + '/chromium/src/build.git@' + Var('build_revision'),
 
+  'build/linux/debian_bullseye_amd64-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and checkout_x64 and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714590045814759,
+        'object_name': 'dec7a3a0fc5b83b909cba1b6d119077e0429a138eadef6bf5a0f2e03b1904631',
+        'sha256sum': 'dec7a3a0fc5b83b909cba1b6d119077e0429a138eadef6bf5a0f2e03b1904631',
+        'size_bytes': 129948576,
+      },
+    ],
+  },
+
+  'build/linux/debian_bullseye_arm64-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and checkout_arm64 and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714589974958986,
+        'object_name': '308e23faba3174bd01accfe358467b8a40fad4db4c49ef629da30219f65a275f',
+        'sha256sum': '308e23faba3174bd01accfe358467b8a40fad4db4c49ef629da30219f65a275f',
+        'size_bytes': 108470444,
+      },
+    ],
+  },
+
+  'build/linux/debian_bullseye_armhf-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and checkout_arm and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714589870087834,
+        'object_name': 'fe81e7114b97440262bce004caf02c1514732e2fa7f99693b2836932ad1c4626',
+        'sha256sum': 'fe81e7114b97440262bce004caf02c1514732e2fa7f99693b2836932ad1c4626',
+        'size_bytes': 99265992,
+      },
+    ],
+  },
+
+  'build/linux/debian_bullseye_i386-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and (checkout_x86 or checkout_x64) and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714589989387491,
+        'object_name': 'b53933120bb08ffc38140a817e3f0f99782254a6bf9622271574fa004e8783a4',
+        'sha256sum': 'b53933120bb08ffc38140a817e3f0f99782254a6bf9622271574fa004e8783a4',
+        'size_bytes': 122047968,
+      },
+    ],
+  },
+
+  'build/linux/debian_bullseye_mips64el-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and checkout_mips64 and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714590006168779,
+        'object_name': '783cb79f26736c69e8125788d95ffb65a28172349009d75188838a004280a92b',
+        'sha256sum': '783cb79f26736c69e8125788d95ffb65a28172349009d75188838a004280a92b',
+        'size_bytes': 103362108,
+      },
+    ],
+  },
+
+  'build/linux/debian_bullseye_mipsel-sysroot': {
+    'bucket': 'chrome-linux-sysroot',
+    'condition': 'checkout_linux and checkout_mips and non_git_source',
+    'dep_type': 'gcs',
+    'objects': [
+      {
+        'generation': 1714589936675352,
+        'object_name': 'fcf8c3931476dd097c58f2f5d44621c7090b135e85ab56885aa4b44f4bd6cdb5',
+        'sha256sum': 'fcf8c3931476dd097c58f2f5d44621c7090b135e85ab56885aa4b44f4bd6cdb5',
+        'size_bytes': 96161964,
+      },
+    ],
+  },
+
   'buildtools':
     Var('chromium_git') + '/chromium/src/buildtools.git@' +
         Var('buildtools_revision'),
@@ -673,41 +758,6 @@
     'condition': 'checkout_rust',
   },
   {
-    'name': 'sysroot_arm',
-    'pattern': '.',
-    'condition': 'checkout_linux and checkout_arm',
-    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
-               '--arch=arm'],
-  },
-  {
-    'name': 'sysroot_arm64',
-    'pattern': '.',
-    'condition': 'checkout_linux and checkout_arm64',
-    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
-               '--arch=arm64'],
-  },
-  {
-    'name': 'sysroot_x86',
-    'pattern': '.',
-    'condition': 'checkout_linux and (checkout_x86 or checkout_x64)',
-    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
-               '--arch=x86'],
-  },
-  {
-    'name': 'sysroot_mips',
-    'pattern': '.',
-    'condition': 'checkout_linux and checkout_mips',
-    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
-               '--arch=mips'],
-  },
-  {
-    'name': 'sysroot_x64',
-    'pattern': '.',
-    'condition': 'checkout_linux and checkout_x64',
-    'action': ['python3', 'build/linux/sysroot_scripts/install-sysroot.py',
-               '--arch=x64'],
-  },
-  {
     'name': 'test_fonts',
     'pattern': '.',
     'action': [ 'python3',