GitLab

Reconstruct of CL to enable untrsuted builds see:
  http://codereview.chromium.org/8416025.

This CL will enable untrusted builds in Chrome.  The first step
is to enable enable building the IRT via this technique instead
of using scons.

DEPS:
  We bump NaCl deps to fix untrusted.gypi in NaCl Repo

ppapi/ppapi_cpp.gypi+
  Add ppapi_cpp library for NEXE

ppapi/native_client/native_client.gyp
  Add ppapi library for NEXE (copy linker script to toolchain dir)
  Add nacl_irt target (the actual IRT.NEXE)

ppapi/ppapi.gyp & ppapi/ppapi_internal.gyp
  Pull in untrusted.gypi from NaCl repo

ppapi/native_client/src/shared/ppapi_proxy/ppapi_proxy.gyp
  Add ppruntime library for NEXE

chrome/nacl.gypi
  Remove scons header scan and scons irt build
  Add dependency to untrusted IRT build in native_client.gyp


BUG= http://code.google.com/p/chromium/issues/detail?id=96782
TEST= try
TBR=dmichael@chromium.org
Review URL: http://codereview.chromium.org/8502036

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109739 0039d316-1c4b-4281-b951-d872f2087c98