Revert r50798 as it seems to create ui test failures

DEPS

 vars = {
   "webkit_trunk":
   "http://svn.webkit.org/repository/webkit/trunk",
   "webkit_revision": "61780",
   "ffmpeg_revision": "49485",
   "skia_revision": "582",
   "chromium_git": "http://src.chromium.org/git",
   "swig_revision": "40423",
   "nacl_revision": "2555",
   "libvpx_revision": "47941",
@@ skipping 82 matching lines @@
   # to map them here.  In practice, these do not take up much space.
   "src/chrome/test/data/layout_tests/LayoutTests/fast/events":
     Var("webkit_trunk") + "/LayoutTests/fast/events@" +
     Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/fast/js/resources":
     Var("webkit_trunk") + "/LayoutTests/fast/js/resources@" +
     Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/fast/workers":
     Var("webkit_trunk") + "/LayoutTests/fast/workers@" +
     Var("webkit_revision"),
-  "src/chrome/test/data/layout_tests/LayoutTests/http/tests/appcache":
-    Var("webkit_trunk") + "/LayoutTests/http/tests/appcache@" +
-    Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/http/tests/resources":
     Var("webkit_trunk") + "/LayoutTests/http/tests/resources@" +
     Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/http/tests/workers":
     Var("webkit_trunk") + "/LayoutTests/http/tests/workers@" +
     Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/http/tests/xmlhttprequest":
     Var("webkit_trunk") + "/LayoutTests/http/tests/xmlhttprequest@" +
     Var("webkit_revision"),
   "src/chrome/test/data/layout_tests/LayoutTests/platform/chromium/fast/workers":
@@ skipping 176 matching lines @@
   },
   {
     # Workaround XCode dependecies problem.
     # TODO(bradnelson): remove this when fixed.
     "pattern": ".",
     "action": ["python",
                "src/build/mac/clobber_generated_headers.py"],
   },
 ]