Made gyp file for command buffer libraries.

Gyp build works on Windows. Mac and linux won't work yet.
Fixed some warnings.
Switched from dxerr.lib to dxerr9.lib.
Implemented a Texture::SetRect case for DXT compressed textures.
Fixed division by zero for zero stride vertex buffers.
TEST=none
BUG=none

Review URL: http://codereview.chromium.org/200127

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@26271 0039d316-1c4b-4281-b951-d872f2087c98