[PDF] Fix printing crashes caused by font streams that don't support getMemoryBase().

[PDF] Fix printing crashes caused by font streams that don't support getMemoryBase().

An apparently recently change started putting web fonts into SkStream objects that don't support getMemoryBase().  This change uses writeStream to avoid needing to call getMemoryBase().

BUG=chromium:274440
R=bungeman@google.com

Committed: https://code.google.com/p/skia/source/detail?r=10918

[vandebo (ex-Chrome), 2013-08-26 16:52:46]

PTAL

[reed1, 2013-08-26 17:03:55]

adding Ben for streamy stuff

[bungeman-skia, 2013-08-26 17:23:48]

lgtm

Having an extra buffer/copy along the way is somewhat annoying here. It would be
nice if SkWStream::writeStream tested for getMemoryBase and
hasPosition/getPosition and would use those instead when available. Even better
would be if it were virtual so it could be overridden by the memory backed
writable streams, since they already are their own buffer.

[commit-bot: I haz the power, 2013-08-26 17:27:30]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/vandebo@chromium.org/23414007/1

[commit-bot: I haz the power, 2013-08-26 17:40:50]

Retried try job too often on Build-Mac10.7-Clang-x86-Release-Trybot for step(s)
BuildMost
http://173.255.115.253:10117/buildstatus?builder=Build-Mac10.7-Clang-x86-Rele...

[commit-bot: I haz the power, 2013-08-26 17:42:08]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/vandebo@chromium.org/23414007/1

[commit-bot: I haz the power, 2013-08-26 17:55:02]

Retried try job too often on Build-Mac10.7-Clang-x86-Release-Trybot for step(s)
BuildMost
http://173.255.115.253:10117/buildstatus?builder=Build-Mac10.7-Clang-x86-Rele...

[vandebo (ex-Chrome), 2013-08-26 18:02:05]

Committed patchset #1 manually as r10918 (presubmit successful).