Check dimensions and content of bitmaps in EmbedderTests.

Review-Url: https://codereview.chromium.org/2514173002
diff --git a/testing/libfuzzer/DEPS b/testing/libfuzzer/DEPS
new file mode 100644
index 0000000..b1d034e
--- /dev/null
+++ b/testing/libfuzzer/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  '+xfa',
+]