Roll PDFium 6f10254..3e454bf

https://pdfium.googlesource.com/pdfium.git/+log/6f10254..3e454bf

BUG=409472,629839

TEST=bots
TBR=ochang@chromium.org

Review-Url: https://codereview.chromium.org/2193623005
Cr-Commit-Position: refs/heads/master@{#408862}

DEPS

@@ -56,7 +56,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.
-  'pdfium_revision': '6f1025492801aaa93fca2c0ed7c40a3389ad8cd1',
+  'pdfium_revision': '3e454bfb00089eb022ee0b09e1631dbd61e324c4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling openmax_dl
   # and whatever else without interference from each other.

build_overrides/pdfium.gni

@@ -10,3 +10,6 @@ pdf_enable_xfa_override = false
 
 # Disable use of Skia backend.
 pdf_use_skia_override = false
+
+# Disable experimental win32 APIs.
+pdf_use_win32_gdi_override = false