As a part of the partial-sdk retirement plan, this CL removes the code that installs PPAPI headers in the toolchain directory.
As a part of the partial-sdk retirement plan, this CL removes
the code that installs PPAPI headers in the toolchain directory.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=1859
TEST=trybots
Review URL: http://codereview.chromium.org/7075033

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5535 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client