Link to DirectWrite directly, instead of calling LoadLibrary

content/test/BUILD.gn

Index: content/test/BUILD.gn
diff --git a/content/test/BUILD.gn b/content/test/BUILD.gn
index 1825beed27ed48597b34d528ee32b63ba300d50c..b766f36cc64c4542e1207789d9383125bea1e363 100644
--- a/content/test/BUILD.gn
+++ b/content/test/BUILD.gn
@@ -788,6 +788,7 @@ test("content_unittests") {
   }
   if (is_win) {
     deps += [ "//third_party/iaccessible2" ]
+    libs = [ "dwrite.lib" ]
   }
   if (is_mac) {
     # These flags are needed to run the test on Mac.