Force another diagnostic reporting path to be warn-only on Windows.

tools/clang/plugins/FindBadConstructsConsumer.cpp

Index: tools/clang/plugins/FindBadConstructsConsumer.cpp
diff --git a/tools/clang/plugins/FindBadConstructsConsumer.cpp b/tools/clang/plugins/FindBadConstructsConsumer.cpp
index 4c40d52faae694983d4b18f5fdc8643bdf1eb6e7..2524550e6369bd1b13a2c6ec7e024179fc1070d7 100644
--- a/tools/clang/plugins/FindBadConstructsConsumer.cpp
+++ b/tools/clang/plugins/FindBadConstructsConsumer.cpp
@@ -560,8 +560,8 @@ FindBadConstructsConsumer::CheckRecordForRefcountIssue(
 // -Werror.
 DiagnosticsEngine::Level FindBadConstructsConsumer::getErrorLevel() {
 #if defined(LLVM_ON_WIN32)
-  // Only warn on Windows, since there are a lot of potential pre-existing
-  // issues.
+  // TODO(dcheng): Re-enable -Werror for these diagnostics on Windows once all
+  // the pre-existing warnings are cleaned up. https://crbug.com/467287
   return DiagnosticsEngine::Warning;
 #else
   return diagnostic().getWarningsAsErrors() ? DiagnosticsEngine::Error