Add PDFium build_overrides

build_overrides/pdfium.gni

Index: build_overrides/pdfium.gni
diff --git a/build_overrides/pdfium.gni b/build_overrides/pdfium.gni
new file mode 100644
index 0000000000000000000000000000000000000000..86751eb27df17762ff58c3eb5f908d7f6c6d2cc0
--- /dev/null
+++ b/build_overrides/pdfium.gni
@@ -0,0 +1,19 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# On Android there's no system FreeType. On Windows and Mac, only a few
+# methods are used from it.
+pdfium_bundle_freetype = !is_linux
+
+# Enable use of Javascript in PDFs.
+pdf_enable_v8 = true
+
+# Disable XFA forms in Chromium builds.
+pdf_enable_xfa = false
+
+# Disable use of Skia backend.
+pdf_use_skia = false
+
+# Build is part of Chrome, not standalone.
+pdf_is_standalone = false

[Dirk Pranke, 2016/04/28 00:53:12]

You could theoretically use the build_with_chromium flag in
//build_overrides/build.gni instead.

[dsinclair, 2016/04/28 14:14:45]

My preference is to not tie this to chromium as PDFium can be embedded in other
contexts as well.