Roll PDFium to 1e580a10fad09833552deb797128e00c50d74bce

This brings in:
1e580a1 Fix multiply defined macro in zlib.h on linux_chromium_clobber_rel_ng builder.
0700106 Make conversions for CPDF_Link explicit.
8842c62 Fix the pdfium component build.
5a370d7 Make conversion between CPDF_Dest and its object explicit.
7348fae Add gmock to .gitignore
624b6c1 Make conversion between CPDF_Action and its dictionary explicit.
61c25ee Merge to Master: Fix a compiling error in fxjs_v8.h
e1671bd Kill off JS_ErrorString type.
b720d0a Return error information from pdfium to JS.
944ccad Do hit tests against Annots in reverse order.
5b47dbf Remove unused IDS_ constants from pdfium.
3d25502 Pull in gmock for standalone pdfium builds.
ec61a85 Upgrade openjpeg to revision 2997.
42a8ada Implement a delegate for EmbedderTests.
57e4c86 Kill off unused IFXJS interface methods.
4351ac2 Fix compilation error on Windows.
f9cfdda Add small flate decode unit test.
e796478 Kill multi-byte comments in fxet_list.h
23f9288 Convert pdfium expected test results to PNG format.
0fd53cf Fix GN build after PNG support backport
ef1e85c Backport PNG output format to origin/master branch.

BUG=445408,457493,PDFIUM:123

Review URL: https://codereview.chromium.org/989213003

Cr-Commit-Position: refs/heads/master@{#319781}

DEPS

@@ -66,7 +66,7 @@ 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': '28ddd48bfd84c55cc51d0b16fa533c51affdeb5b',
+  'pdfium_revision': '1e580a10fad09833552deb797128e00c50d74bce',
   # 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.