Add paging support for handle based typefaces.

[bungeman, 2011-11-15 18:41:10]

Alternative to http://codereview.appspot.com/5364052/ .

[bungeman, 2011-11-15 19:18:26]

The way this would work in Chromium is that the Chromium gyp would not add
SkFontHost_sandbox_none.cpp. Instead Chromium would have its own
skia/ext/SkFontHost_sandbox_win.cpp which would then make the IPC to get GDI to
remap the font data into system memory. The advantage is that this means we can
always make the IPC only when needed, this would not be specific to the print
path.

[Steve VanDeBogart, 2011-11-15 21:53:28]

LGTM

[bungeman, 2011-11-15 22:58:24]

Committed revision 2693.
Committed revision 2694.