gn/win: Try to get chrome_elf_unittests passing on swarming.

chrome_elf/BUILD.gn

Index: chrome_elf/BUILD.gn
diff --git a/chrome_elf/BUILD.gn b/chrome_elf/BUILD.gn
index d251a106c68ea17d218960e9419b2f2739f1b5a4..218c2240a0fc86c3bd07196af7ebcd6e5a858097 100644
--- a/chrome_elf/BUILD.gn
+++ b/chrome_elf/BUILD.gn
@@ -137,16 +137,24 @@ test("chrome_elf_unittests") {
     "//base",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
+    "//chrome",
     "//chrome/common:version_header",
     "//sandbox",
     "//testing/gtest",
   ]
+
+  # It's not easily possible to have //chrome in data_deps without changing
+  # the //chrome target to bundle up both initial/chrome.exe and chrome.exe.
+  # As a workaround, explicitly include a data dep on just chrome.exe, and
+  # add //chrome to deps above to make sure it's been built.
+  data = [
+    "$root_out_dir/chrome.exe",
+  ]
   data_deps = [
     ":blacklist_test_dll_1",
     ":blacklist_test_dll_2",
     ":blacklist_test_dll_3",
     ":chrome_elf",
-    "//chrome",
   ]
 }