Extracted media mime type checks from net/base/ into media/base/

content/shell/DEPS

 include_rules = [
   "+gin/public",
   "+v8/include",
 
   # For chromeos build config
   "+chromeos/dbus",
   "+device/bluetooth",  # BluetoothAdapterFactory::Shutdown.
 
   # The content_shell is the canonical sample embedder, so it only uses
   # content's public API.
   "+content/app/strings/grit",  # For generated headers
   "+content/public",
 
   # The content_shell is an embedder so it must work with resource bundles.
   "+ui/base/l10n",
   "+ui/base/resource",
 
   # Shell resources
   "+grit/shell_resources.h",
 
   # The content_shell for aura must work with the views and aura
   "+ui/aura",
   "+ui/views",
 
   "+components/crash",
 
   # For enabling media related features.
   "+media/base/media_switches.h",
+  "+media/base/mime_util.h",
 ]
 
 specific_include_rules = {
   "shell_views\.cc": [
     "+ui/wm/test"
   ],
   "content_browser_tests_android\.cc": [
     "+media/base"
   ],
   # Test hook.
   "shell_mojo_test_utils_android\.cc": [
     "+content/browser/mojo",
     "+content/common/mojo",
   ],
 }