Remove libjingle_root GYP variable

It is no longer needed.

R=andrew@webrtc.org, perkj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/44449004

Cr-Commit-Position: refs/heads/master@{#8627}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8627 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/build/common.gypi b/talk/build/common.gypi
index 6cde99f..093933c 100644
--- a/talk/build/common.gypi
+++ b/talk/build/common.gypi
@@ -30,9 +30,7 @@
 {
   'variables': {
     'webrtc_root%': '<(DEPTH)/webrtc',
-    # TODO(ronghuawu): Chromium build will need a different libjingle_root.
     'libjingle_tests_additional_deps%': [],
-    'libjingle_root%': '<(DEPTH)',
     # TODO(ronghuawu): For now, disable the Chrome plugins, which causes a
     # flood of chromium-style warnings.
     'clang_use_chrome_plugins%': 0,
@@ -45,8 +43,8 @@
   },
   'target_defaults': {
     'include_dirs': [
-      '<(libjingle_root)',
       '<(DEPTH)',
+      '../..',
       '../../third_party',
       '../../third_party/webrtc',
       '../../webrtc',