Disable kSSizeMaxConst COMPILE_ASSERT() for Android / Mac / IOS

The kSSizeMaxConst COMPILE_ASSERT() was previously disabled for clang only, due
to clang giving a build error on Android / Mac / IOS. gcc is affected by the
same problem so this CL disables the COMPILE_ASSERT() for Android / Mac / IOS
platforms, instead of doing it for a specific compiler.

The reason why this COMPILE_ASSERT() does not build on those platforms is that
static_assert only works with compile-time constants, but mac uses libstdc++4.2
and android uses stlport, which both don't mark numeric_limits::max() as
constexpr.

R=Nico

Review URL: https://codereview.chromium.org/98403005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239352 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239352