roll pdfium to e0399c76

Changes include:
e0399c7 Fix Regression: Incomplete file loading is seen for multi page pdf files.
9135010 gn: don't remove -fno-exceptions to match gyp
69dcf14 When forcing clear page data, no need to release colorspace when releasing pattern
4481496 Add a boundary check before accessing the table of 'Index to Location'
4cce875 Check Null pointer in CPDF_Dictionary::GetUnicodeText
56ef173 Fix hebrew character highlight issue in a special document

TBR=jam@chromium.org
BUG=

Review URL: https://codereview.chromium.org/580173004

Cr-Commit-Position: refs/heads/master@{#295555}

DEPS

@@ -59,7 +59,7 @@ 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': '12a9940905825e028bebc0bf8d3eddcc65b1933d',
+  'pdfium_revision': 'e0399c76ba1412926a3d55f6328a095c23467951',
   # 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.