Update checkdeps.py rules in DEPS

The initial rules didn't allow including
source from third_party, which is incorrect.
Cleanup irrelevant rules for directories that
are ignored, since WebRTC don't have any source
code in those locations.

BUG=
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/30599004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7351 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index 3357a10..ca38476 100644
--- a/DEPS
+++ b/DEPS
@@ -34,22 +34,22 @@
   },
 }
 
+# Define rules for which include paths are allowed in our source.
 include_rules = [
   # Base is only used to build Android APK tests and may not be referenced by
   # WebRTC production code.
   "-base",
   "-chromium",
+  '+gflags',
   '+net',
   '+talk',
   '+testing',
+  '+third_party',
   '+webrtc',
 ]
 
 # checkdeps.py shouldn't check include paths for files in these dirs:
 skip_child_includes = [
-  'gflags',
-  'testing',
-  'third_party',
   'webrtc/overrides',
 ]