Fixes incorrect PDF file font metrics.

[yurydelendik]

The PDF lies about font metrics in font descriptors, e.g. PDF file from #4339 http://www.nasa.gov/pdf/750614main_NASA_FY_2014_Budget_Estimates-508.pdf . It's noticeable in the text layer.

Font HJMTJJ+TimesNewRoman report in PDF Ascent=1026/1000 and Descent=-307/1000, but the font hhea Ascent=1638/2048 and Descent = -410/2048.

[yurydelendik]

/botio test

[pdfjsbot]

From: Bot.io (Linux)

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Received

Command cmd_test from @yurydelendik received. Current queue size: 0

Live output at: http://107.21.233.14:8877/8c4d3708d8d1449/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_test from @yurydelendik received. Current queue size: 0

Live output at: http://107.22.172.223:8877/1f09af14d8372b8/output.txt

[Snuffleupagus]

This also seems to fix #4665, nicely done!

[pdfjsbot]

From: Bot.io (Windows)

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Failed

Full output at http://107.22.172.223:8877/1f09af14d8372b8/output.txt

Total script time: 18.79 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: FAILED

Image differences available at: http://107.22.172.223:8877/1f09af14d8372b8/reftest-analyzer.html#web=eq.log

[pdfjsbot]

From: Bot.io (Linux)

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Failed

Full output at http://107.21.233.14:8877/8c4d3708d8d1449/output.txt

Total script time: 19.64 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: FAILED

Image differences available at: http://107.21.233.14:8877/8c4d3708d8d1449/reftest-analyzer.html#web=eq.log

[brendandahl]

/botio makeref

[pdfjsbot]

From: Bot.io (Linux)

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Received

Command cmd_makeref from @brendandahl received. Current queue size: 0

Live output at: http://107.21.233.14:8877/4d43a9096460882/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_makeref from @brendandahl received. Current queue size: 0

Live output at: http://107.22.172.223:8877/3c9015bddc28ae8/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Success

Full output at http://107.22.172.223:8877/3c9015bddc28ae8/output.txt

Total script time: 19.42 mins

• Lint: Passed
• Make references: Passed
• Check references: Passed

[pdfjsbot]

From: Bot.io (Linux)

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Success

Full output at http://107.21.233.14:8877/4d43a9096460882/output.txt

Total script time: 19.99 mins

• Lint: Passed
• Make references: Passed
• Check references: Passed

[yurydelendik]

Assuming that intent of makeref was to land the patch, merging... thanks

[a0preetham]

Can you please pull #7046 as well ? This is a small fix to handle the overrides when descent/yMin is zero. Thanks