Merge to XFA: Revert "One test runner to rule them all."

Merge to XFA: Revert "One test runner to rule them all."

This reverts commit a1215ba51a235fb7abcb995f0e768ea0176d9275.

Revert "Return result of the test runner."

This reverts commit d1579c9b92b7f9c1d9e0fac1ecb8e3cb23875fca.

Reverting the new test_runner code as there appears to be something string
happening on the non-Linux boxes on XFA.

It looks like it ran the font_size test twice, once with the .in and once with
the .pdf. The .in was suppressed, the .pdf faild and wasn't suppressed.

Rendering PDF file /Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.
Rendered 1 pages.
Skipped 0 bad pages.
Checking /Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.0.png
FAILURE: font_size.in; Command '['/Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/pdfium_diff', '/Volumes/data/b/build/slave/mac_xfa/build/pdfium/testing/resources/pixel/font_size_expected.pdf.0.png', '/Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.0.png']' returned non-zero exit status 1
font_size.in is suppressed, found in SUPPRESSIONS_mac file

Rendering PDF file /Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.
Rendered 1 pages.
Skipped 0 bad pages.
Checking /Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.0.png
FAILURE: font_size.pdf; Command '['/Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/pdfium_diff', '/Volumes/data/b/build/slave/mac_xfa/build/pdfium/testing/resources/pixel/font_size_expected.pdf.0.png', '/Volumes/data/b/build/slave/mac_xfa/build/pdfium/out/Debug/gen/pdfium/testing/pixel/font_size.pdf.0.png']' returned non-zero exit status 1

TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1410743008 .

(cherry picked from commit e067f7bab4317704de27917c1befa8f57a0e78d7)

Committed: https://pdfium.googlesource.com/pdfium/+/dccfe5736818f94f7e084105e6d2ab6d5d3a9941

[dsinclair, 2015-11-03 16:29:56]

TBRing, merge clean.

[dsinclair, 2015-11-03 16:30:04]

Committed patchset #1 (id:1) manually as
dccfe5736818f94f7e084105e6d2ab6d5d3a9941 (presubmit successful).

[Lei Zhang, 2015-11-03 17:00:11]

whomp whomp lgtm