Implement support for loading font files from outside system directory

Implement support for loading font files from outside system directory

Implement support for loading font files from outside system
directory. When a font file is installed outside the system font
dir, we will now have the browser give the renderer a handle to
the file that it can use to access the font data.

This change will bypass sandbox restrictions that normally
prevents the renderer from opening fonts outside the windows
fonts directory.

BUG=610466
Review-Url: https://codereview.chromium.org/2153343002
Cr-Commit-Position: refs/heads/master@{#407658}
(cherry picked from commit 96ce8347f39ce0eebd10de476afb08c0afb406c9)

Committed: https://chromium.googlesource.com/chromium/src/+/8d50cfd5f7036ee15954b328b667e55097b1d313

[Ilya Kulshin, 2016-08-01 22:21:43]

Description was changed from

==========
Implement support for loading font files from outside system directory

Implement support for loading font files from outside system
directory. When a font file is installed outside the system font
dir, we will now have the browser give the renderer a handle to
the file that it can use to access the font data.

This change will bypass sandbox restrictions that normally
prevents the renderer from opening fonts outside the windows
fonts directory.

BUG=610466

Review-Url: https://codereview.chromium.org/2153343002
Cr-Commit-Position: refs/heads/master@{#407658}
(cherry picked from commit 96ce8347f39ce0eebd10de476afb08c0afb406c9)
==========

to

==========
Implement support for loading font files from outside system directory

Implement support for loading font files from outside system
directory. When a font file is installed outside the system font
dir, we will now have the browser give the renderer a handle to
the file that it can use to access the font data.

This change will bypass sandbox restrictions that normally
prevents the renderer from opening fonts outside the windows
fonts directory.

BUG=610466

Review-Url: https://codereview.chromium.org/2153343002
Cr-Commit-Position: refs/heads/master@{#407658}
(cherry picked from commit 96ce8347f39ce0eebd10de476afb08c0afb406c9)

Committed:
https://chromium.googlesource.com/chromium/src/+/8d50cfd5f7036ee15954b328b667...
==========

[Ilya Kulshin, 2016-08-01 22:21:45]

Committed patchset #1 (id:1) manually as
8d50cfd5f7036ee15954b328b667e55097b1d313.