Move the IsSupported* mime functions out of //net and into //components/mime_util

chrome/chrome_browser.gypi

 # Copyright 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 3030 matching lines @@
         '../components/components.gyp:user_prefs',
         '../components/components.gyp:wallpaper',
         '../components/components_strings.gyp:components_strings',
         # This depends directly on the variations target, rather than just
         # transitively via the common target because the proto sources need to
         # be generated before code in this target can start building.
         '../components/components.gyp:variations',
         '../components/components.gyp:variations_http_provider',
         '../components/components.gyp:webdata_common',
         '../components/components.gyp:webdata_services',
+        '../components/mime_util/mime_util.gyp:mime_util',
         '../content/content.gyp:content_browser',
         '../content/content.gyp:content_common',
         '../courgette/courgette.gyp:courgette_lib',
         '../crypto/crypto.gyp:crypto',
         '../google_apis/google_apis.gyp:google_apis',
         '../jingle/jingle.gyp:notifier',
         '../skia/skia.gyp:skia',
         '../sql/sql.gyp:sql',
         '../sync/sync.gyp:sync',
         '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation',
@@ skipping 789 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }