Add a unittest for base::SysInfo::MaxSharedMemorySize on all OS_POSIX systems where it's available by checking the return value.
Add a unittest for base::SysInfo::MaxSharedMemorySize
on all OS_POSIX systems where it's available by checking
the return value.


BUG=
TEST=base_unittests SysInfoTest.MaxSharedMemorySize

Review URL: http://codereview.chromium.org/8381022

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@107014 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,adobe/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,gavinp/chromium