Merge 92159 - Shard webcore_remaining for msvs official builds

Merge 92159 - Shard webcore_remaining for msvs official builds

https://bugs.webkit.org/show_bug.cgi?id=65475

Patch by Bradley Nelson <bradnelson@chromium.org>; on 2011-08-01
Reviewed by Darin Fisher.

webcore_remaining has consistently exceeded Visual Studio 2008's
capacity to link when link time code generation is turned on (full
release builds).  This has been dealt with the past by carving off
larger and larger pieces of webcore_remaining (ie webcore_html,
webcore_renderer etc).
A new option has been added to gyp to automate this sharding:
'msvs_shard': SHARD_COUNT,
Targets marked in this way will be built in several pieces
(target_0, target_1...).
Since the resulting project is less comprehensible in the IDE (and
since the linking limitation only afflicts official builds), this
option is only needed for those builds.
This patch shards webcore_remaining into 10 parts for official builds.

* WebCore.gyp/WebCore.gyp:

TBR=commit-queue@webkit.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=93619