Increase the size of HttpDownloaderTest.

--
MOS_MIGRATED_REVID=140190652
diff --git a/src/test/java/com/google/devtools/build/lib/bazel/repository/downloader/BUILD b/src/test/java/com/google/devtools/build/lib/bazel/repository/downloader/BUILD
index 988efb8..feec6e1 100644
--- a/src/test/java/com/google/devtools/build/lib/bazel/repository/downloader/BUILD
+++ b/src/test/java/com/google/devtools/build/lib/bazel/repository/downloader/BUILD
@@ -6,6 +6,7 @@
 
 java_test(
     name = "DownloaderTestSuite",
+    size = "large",  # times out on Windows otherwise
     srcs = glob(["*.java"]),
     tags = ["rules"],
     deps = [