NaCl: Update revision in DEPS, r6459 -> r6490
NaCl: Update revision in DEPS, r6459 -> r6490

This pulls in the following Native Client changes:

r6460: (halyavin) Allow to open files that doesn't exists in manifest.
r6461: (mcgrathr) Diagnose EBADF before EFAULT
r6462: (bsy) plumb through -1 handling properly.  added test case.
r6463: (mcgrathr) Define standard name MAP_ANON, not only Linux alias MAP_ANONYMOUS
r6464: (mcgrathr) Move IMC and SRPC tests out of nacl_irt_test mode
r6465: (khim) aee24c5 Remove useless __nacl_irt_ppapi_* functions.
r6466: (pdox) Activate "upstream" repository.
r6467: (mseaborn) Move NaClSysCommonThreadSuicide() into nacl_app_thread.c
r6468: (pdox) Adjust filenames of glibc libraries in utman.sh to fix PNaCl glibc bot.
r6469: (pdox) Update PNaCl glibc build to handle fluctuations in the glibc version number.
r6470: (pdox) Second part of CL for activating upstream repository. Roll pnacl DEPS to bring in new toolchain build.
r6471: (jvoung) Update nacl_perf_expectations for pnacl bitcode size. After merging
r6472: (pdox) Update UPSTREAM_REV to enable ARM EH frame initialization fix:
r6473: (khim) 3e68dd0 [noupstream] Correctly handle sonames with "a-f" hex numbes.
r6474: (halyavin) Remove workaround for bug 2153 in manifest file opening since this bug is fixed.
r6475: (khim) Bump toolchain DEPS, enable dynamic browsers test.
r6476: (pdox) Re-enable ARM EH tests which are now passing.
r6477: (halyavin) Fix dependcy problem with dynamic browser test
r6478: (dschuff) Update perf_expectations following regression in gcc runtime
r6479: (sehr) Remove link to obsolete SRPC plugin properties example.
r6480: (mcgrathr) Don't try to build irt_manifest_file_test under irt=0
r6482: (kschimpf) Move register sfi x86-64 validator to its own directory.
r6483: (krasin) service_runtime: get rid of using a global variable nacl_syscall in nacl_syscall_hook.
r6484: (nfullagar) NaCl Proxy for graphics3d.
r6485: (mcgrathr) Revert "Drop 'chrome_browser_tests without IRT' step from buildbots"
r6486: (ncbray) Create the sel_ldr process ASAP to increase parallelism during plugin startup.
r6487: (mseaborn) Minor style tweaks to NaClAppThreadTeardown()
r6488: (jvoung) Tweak spec2k/run_all script to show fewer steps on the build waterfall.
r6489: (nfullagar) Remove surface 3d and context 3d proxy from nacl.
r6490: (mcgrathr) Add irt-resource-open interface to irt_core.nexe

BUG=none
TEST=nacl_integration


Review URL: http://codereview.chromium.org/7669068

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@97490 0039d316-1c4b-4281-b951-d872f2087c98

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