I've always had an issue with this; no matter what I try, everytime I enforce the usr.bin.chromium-browser profile, Chromium won't start. I can see it in the system monitor, and it shows up enforce, but the windows itself doesn't load. I've tried doing what this guy said here but the bug still does not appear to be fixed in apparmor 2.7. Here is the profile:
# Author: Jamie Strandboge <jamie@canonical.com>
#include <tunables/global>

# We need 'flags=(attach_disconnected)' in newer chromium versions
/usr/lib/chromium-browser/chromium-browser flags=(complain) {
  #include <abstractions/audio>
  #include <abstractions/base>
  #include <abstractions/cups-client>
  #include <abstractions/dbus-session>
  #include <abstractions/fonts>
  #include <abstractions/freedesktop.org>
  #include <abstractions/gnome>
  #include <abstractions/nameservice>
  #include <abstractions/user-tmp>

  # This include specifies which ubuntu-browsers.d abstractions to use. Eg, if
  # you want access to productivity applications, adjust the following file
  # accordingly.
  #include <abstractions/ubuntu-browsers.d/chromium-browser>

  # Networking
  network inet stream,
  network inet6 stream,
  @{PROC}/[0-9]*/net/if_inet6 r,
  @{PROC}/[0-9]*/net/ipv6_route r,

  # Should maybe be in abstractions
  /etc/mime.types r,
  /etc/mailcap r,
  /etc/xdg/xubuntu/applications/defaults.list r,
  owner @{HOME}/.local/share/applications/defaults.list r,
  owner @{HOME}/.local/share/applications/mimeinfo.cache r,

  @{PROC}/[0-9]*/fd/ r,
  @{PROC}/filesystems r,
  @{PROC}/ r,
  @{PROC}/[0-9]*/task/[0-9]*/stat r,
  owner @{PROC}/[0-9]*/cmdline r,
  owner @{PROC}/[0-9]*/io r,
  owner @{PROC}/[0-9]*/stat r,
  owner @{PROC}/[0-9]*/status r,

  # Newer chromium needs these now
  /sys/devices/pci[0-9]*/**/class r,
  /sys/devices/pci[0-9]*/**/device r,
  /sys/devices/pci[0-9]*/**/irq r,
  /sys/devices/pci[0-9]*/**/resource r,
  /sys/devices/pci[0-9]*/**/vendor r,

  # Needed for the crash reporter
  owner @{PROC}/[0-9]*/auxv r,

  # chromium mmaps all kinds of things for speed.
  /etc/passwd m,
  /usr/share/fonts/truetype/**/*.tt[cf] m,
  /usr/share/fonts/**/*.pfb m,
  /usr/share/mime/mime.cache m,
  /usr/share/icons/**/*.cache m,
  owner /{dev,run}/shm/pulse-shm* m,
  owner @{HOME}/.local/share/mime/mime.cache m,
  owner /tmp/** m,

  @{PROC}/sys/kernel/shmmax r,
  owner /{dev,run}/shm/{,.}org.chromium.* mrw,

  /usr/lib/chromium-browser/*.pak mr,
  /usr/lib/chromium-browser/locales/* mr,

  # Noisy
  deny /usr/lib/chromium-browser/** w,

  # Make browsing directories work
  / r,
  /**/ r,

  # Allow access to documentation and other files the user may want to look
  # at in /usr
  /usr/{include,share,src}** r,

  # Default profile allows downloads to ~/Downloads and uploads from ~/Public
  owner @{HOME}/ r,
  owner @{HOME}/Public/ r,
  owner @{HOME}/Public/* r,
  owner @{HOME}/Downloads/ r,
  owner @{HOME}/Downloads/* rw,

  # Helpers
  /usr/bin/xdg-open ixr,
  /usr/bin/gnome-open ixr,
  /usr/bin/gvfs-open ixr,
  # TODO: kde, xfce

  # Importing firefox settings (requires 'r' access to @{HOME}/.mozilla/**
  # which is provided by abstractions/ubuntu-browsers.d/user-files).
  @{PROC}/[0-9]*/oom_{,score_}adj w,
  /etc/firefox/profile/bookmarks.html r,
  owner @{HOME}/.mozilla/** k,

  # Chromium configuration
  owner @{HOME}/.pki/nssdb/* rwk,
  owner @{HOME}/.cache/chromium/ rw,
  owner @{HOME}/.cache/chromium/** rw,
  owner @{HOME}/.cache/chromium/Cache/* mr,
  owner @{HOME}/.config/chromium/ rw,
  owner @{HOME}/.config/chromium/** rwk,
  owner @{HOME}/.config/chromium/**/Cache/* mr,
  owner @{HOME}/.config/chromium/Dictionaries/*.bdic mr,
  owner @{HOME}/.config/chromium/**/Dictionaries/*.bdic mr,

  # Allow transitions to ourself and our sandbox
  /usr/lib/chromium-browser/chromium-browser ix,
  /usr/lib/chromium-browser/chromium-browser-sandbox cx -> chromium_browser_sandbox,

  # TODO: child profile
  /bin/ps Uxr,
  /usr/lib/chromium-browser/xdg-settings Ux,
  /usr/bin/xdg-settings Ux,

  # Site-specific additions and overrides. See local/README for details.
  #include <local/usr.bin.chromium-browser>

profile chromium_browser_sandbox flags=(complain) {
    # Be fanatical since it is setuid root and don't use an abstraction
    /lib/libgcc_s.so* mr,
    /lib{,32,64}/libm-*.so* mr,
    /lib/@{multiarch}/libm-*.so* mr,
    /lib{,32,64}/libpthread-*.so* mr,
    /lib/@{multiarch}/libpthread-*.so* mr,
    /lib{,32,64}/libc-*.so* mr,
    /lib/@{multiarch}/libc-*.so* mr,
    /lib{,32,64}/libld-*.so* mr,
    /lib/@{multiarch}/libld-*.so* mr,
    /lib{,32,64}/ld-*.so* mr,
    /lib/@{multiarch}/ld-*.so* mr,
    /lib/tls/*/{cmov,nosegneg}/libm-*.so* mr,
    /lib/tls/*/{cmov,nosegneg}/libpthread-*.so* mr,
    /lib/tls/*/{cmov,nosegneg}/libc-*.so* mr,
    /usr/lib/libstdc++.so* mr,
    /etc/ld.so.cache r,

    # Required for dropping into PID namespace. Keep in mind that until the
    # process drops this capability it can escape confinement, but once it
    # drops CAP_SYS_ADMIN we are ok.
    capability sys_admin,

    # All of these are for sanely dropping from root and chrooting
    capability chown,
    capability fsetid,
    capability setgid,
    capability setuid,
    capability dac_override,
    capability sys_chroot,

    # *Sigh*
    capability sys_ptrace,

    @{PROC}/ r,
    @{PROC}/[0-9]*/ r,
    @{PROC}/[0-9]*/fd/ r,
    @{PROC}/[0-9]*/oom_adj w,
    @{PROC}/[0-9]*/oom_score_adj w,
    @{PROC}/[0-9]*/task/[0-9]*/stat r,

    /usr/bin/chromium-browser r,
    /usr/lib/chromium-browser/chromium-browser Px,
    /usr/lib/chromium-browser/chromium-browser-sandbox r,

    owner /tmp/** rw,
Any help?