Merge to XFA: Reapply "Fix a partial rendering problem"

This reverts commit 054fc955c153eb5c581fd14946848b8b2a77136a.

Additionally, this rolls DEPS for the testing corpus to update test
expectations.

BUG=pdfium:336
TBR=jun_fang@foxitsoftware.com

Review URL: https://codereview.chromium.org/1555833002 .

(cherry picked from commit 5594538fcc96c38db34f336223140cf703e3cca0)

Review URL: https://codereview.chromium.org/1553013002 .
diff --git a/DEPS b/DEPS
index ab27df0..04a3cb6 100644
--- a/DEPS
+++ b/DEPS
@@ -8,7 +8,7 @@
     "https://chromium.googlesource.com/chromium/buildtools.git@c2f259809d5ede3275df5ea0842f0431990c4f98",
 
   "testing/corpus":
-     "https://pdfium.googlesource.com/pdfium_tests@45f88c6914fcac26ad930bb0ebbfa468c21db0a5",
+     "https://pdfium.googlesource.com/pdfium_tests@cc132ff8921c76ea69888cae4bb00e01dd1ce0b3",
 
   "testing/gmock":
      "https://chromium.googlesource.com/external/googlemock.git@29763965ab52f24565299976b936d1265cb6a271",