Add clang-format binaries and scripts for all platforms

DEPS

Index: DEPS
diff --git a/DEPS b/DEPS
index 029b53b5a8e9242f96760c4c5ca1e0fd8acb6fe7..c55c7c8964625739da3040e329584ffde57b624f 100644
--- a/DEPS
+++ b/DEPS
@@ -703,6 +703,40 @@ hooks = [
                 "-s", "src/tools/gn/bin/linux/gn32.sha1",
     ],
   },
+  # Pull clang-format binaries using checked-in hashes.
+  {
+    "name": "clang_format_win",
+    "pattern": "src/third_party/clang_format/bin/win/clang-format.exe.sha1",
+    "action": [ "download_from_google_storage",
+                "--no_resume",
+                "--platform=win32",
+                "--no_auth",
+                "--bucket", "chromium-clang-format",
+                "-s", "src/third_party/clang_format/bin/win/clang-format.exe.sha1",
+    ],
+  },
+  {
+    "name": "clang_format_mac",
+    "pattern": "src/third_party/clang_format/bin/mac/clang-format.sha1",
+    "action": [ "download_from_google_storage",
+                "--no_resume",
+                "--platform=darwin",
+                "--no_auth",
+                "--bucket", "chromium-clang-format",
+                "-s", "src/third_party/clang_format/bin/mac/clang-format.sha1",
+    ],
+  },
+  {
+    "name": "clang_format_linux",
+    "pattern": "src/third_party/clang_format/bin/linux/clang-format.sha1",
+    "action": [ "download_from_google_storage",
+                "--no_resume",
+                "--platform=linux*",
+                "--no_auth",
+                "--bucket", "chromium-clang-format",
+                "-s", "src/third_party/clang_format/bin/linux/clang-format.sha1",
+    ],
+  },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "name": "gyp",