[Zucchini] Disable FilePair related fuzzers on Windows

zucchini_raw_apply_seed is failing on ToTWinCFI this disables building
the target on Windows. A first attempt at a fix failed so until a better
method of diagnosing the problem is determined we will disable it as it
wasn't used by ClusterFuzz anyway (Linux only).

Bug: 844826
Change-Id: I47820432ddb94334006ee727120a242684152b97
Reviewed-on: https://chromium-review.googlesource.com/1072506
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561641}

components/zucchini/BUILD.gn

@@ -218,7 +218,8 @@ group("zucchini_fuzzers") {
   ]
 
   # Ensure protoc is available.
-  if (current_toolchain == host_toolchain) {
+  # Disabled on Windows due to crbug/844826.
+  if (current_toolchain == host_toolchain && !is_win) {
     deps += [
       "//components/zucchini/fuzzers:zucchini_raw_apply_fuzzer",
       "//components/zucchini/fuzzers:zucchini_raw_gen_fuzzer",

components/zucchini/fuzzers/BUILD.gn

@@ -37,7 +37,8 @@ proto_library("zucchini_file_pair_proto") {
 }
 
 # Ensure protoc is available.
-if (current_toolchain == host_toolchain) {
+# Disabled on Windows due to crbug/844826.
+if (current_toolchain == host_toolchain && !is_win) {
   # Raw Apply Fuzzer:
   action("zucchini_raw_apply_seed") {
     script = "generate_fuzzer_data.py"