Fixed content::BaseFile::IsEmptyHash call to memset.

The call to memset is meant to compare 32 bytes from the input string against a known string. The constant 32 was stored in kSha256HashLen, however the call to memset passed "sizeof(kSha256HashLen)" instead of simply "kSha256HashLen" as the string size. This meant that only the first 4 or 8 bytes of the string were being compared, instead of the expected 32.

Credit to sl@conew.com for reporting on chromium-discuss.

BUG=None

Review URL: https://codereview.chromium.org/109793016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241975 0039d316-1c4b-4281-b951-d872f2087c98
[NaCl SDK] Add tools/nacl_config.py, for getting SDK path information.

BUG=none
R=sbc@chromium.org

Review URL: https://codereview.chromium.org/111253005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241976 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241976