Reorder hooks to run in a particular order.

"win_toolchain" should run before "clang". This has been the case for
years in Chromium. See https://crrev.com/296090

Bug: chromium:584393,chromium:662325

Change-Id: Ic8e1d54afb0a76a1ed3f198a2d24e97217f8347e
Reviewed-on: https://pdfium-review.googlesource.com/c/50350
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
diff --git a/DEPS b/DEPS
index fc7ce87..2a4f8ea 100644
--- a/DEPS
+++ b/DEPS
@@ -149,6 +149,32 @@
 
 hooks = [
   {
+    # Case-insensitivity for the Win SDK. Must run before win_toolchain below.
+    'name': 'ciopfs_linux',
+    'pattern': '.',
+    'condition': 'checkout_win and host_os == "linux"',
+    'action': [ 'python',
+                'pdfium/third_party/depot_tools/download_from_google_storage.py',
+                '--no_resume',
+                '--no_auth',
+                '--bucket', 'chromium-browser-clang/ciopfs',
+                '-s', 'pdfium/build/ciopfs.sha1',
+    ]
+  },
+  {
+    # Update the Windows toolchain if necessary.  Must run before 'clang' below.
+    'name': 'win_toolchain',
+    'pattern': '.',
+    'condition': 'checkout_win',
+    'action': ['python', 'pdfium/build/vs_toolchain.py', 'update', '--force'],
+  },
+  {
+    # Update the Mac toolchain if necessary.
+    'name': 'mac_toolchain',
+    'pattern': '.',
+    'action': ['python', 'pdfium/build/mac_toolchain.py'],
+  },
+  {
     'name': 'gn_win',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
@@ -180,8 +206,8 @@
                 '-s', 'pdfium/buildtools/linux64/gn.sha1',
     ],
   },
-  # Pull clang-format binaries using checked-in hashes.
   {
+    # Pull clang-format binaries using checked-in hashes.
     'name': 'clang_format_win',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
@@ -215,7 +241,7 @@
     ],
   },
   {
-    # Pull clang
+    # Note: On Win, this should run after win_toolchain, as it may use it.
     'name': 'clang',
     'pattern': '.',
     'action': ['python',
@@ -267,32 +293,6 @@
                '--arch=x64'],
   },
   {
-    # Case-insensitivity for the Win SDK. Must run before win_toolchain below.
-    'name': 'ciopfs_linux',
-    'pattern': '.',
-    'condition': 'checkout_win and host_os == "linux"',
-    'action': [ 'python',
-                'pdfium/third_party/depot_tools/download_from_google_storage.py',
-                '--no_resume',
-                '--no_auth',
-                '--bucket', 'chromium-browser-clang/ciopfs',
-                '-s', 'pdfium/build/ciopfs.sha1',
-    ]
-  },
-  {
-    # Update the Windows toolchain if necessary.
-    'name': 'win_toolchain',
-    'pattern': '.',
-    'condition': 'checkout_win',
-    'action': ['python', 'pdfium/build/vs_toolchain.py', 'update', '--force'],
-  },
-  {
-    # Update the Mac toolchain if necessary.
-    'name': 'mac_toolchain',
-    'pattern': '.',
-    'action': ['python', 'pdfium/build/mac_toolchain.py'],
-  },
-  {
     'name': 'msan_chained_origins',
     'pattern': '.',
     'condition': 'checkout_instrumented_libraries',