linux: Add support for undo in the omnibox.

DEPS

 vars = {
   "googlecode_url": "http://%s.googlecode.com/svn",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "68100",
   "ffmpeg_revision": "58574",
   "skia_revision": "599",
   "chromium_git": "http://src.chromium.org/git",
   "swig_revision": "40423",
   "nacl_revision": "3186",
@@ skipping 258 matching lines @@
   },
 }
 
 
 include_rules = [
   # Everybody can use some things.
   "+base",
   "+build",
   "+ipc",
   "+rlz",
+  "+third_party/undoview",
 
   # For now, we allow ICU to be included by specifying "unicode/...", although
   # this should probably change.
   "+unicode",
   "+testing",
 ]
 
 
 # checkdeps.py shouldn't check include paths for files in these dirs:
 skip_child_includes = [
@@ skipping 10 matching lines @@
 ]
 
 
 hooks = [
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]