PDFium roll a08cf99.

a08cf99 Refactor CFX_BasicArray.
141d61d Check for integer overflow in CFX_BasicArray.
f7f6b0c Remove unnecessary aligned memory check when __SSE__ is used
10e6c7c Only use "final" on MSVS2012+, to keep pdfium building with 2010.
46773fd Fix potential memory violation in CJS_PublicMethods::StrRTrim()
8538642 Fix lookahead beyond bounds in CJS_PublicMethods::MakeFormatDate().
0f14185 Fix FPDF_RenderPage 2x zoom in when bBackgroundAlphaNeeded is true
9e0177a Added options to save pages into BMP and EMF on Windows.

BUG=179413

Review URL: https://codereview.chromium.org/415833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@285121 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -77,7 +77,7 @@ 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": "22b31e0b3d14a50c4dd70ed22e0f24975dc1137c",
+  "pdfium_revision": "a08cf99d066b16e4e16393efc15174193e002371",
   # 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.