Update build files to use webrtc_overrides in Chromium instead of overrides.

webrtc/build/common.gypi

Index: webrtc/build/common.gypi
diff --git a/webrtc/build/common.gypi b/webrtc/build/common.gypi
index 7b17d43662b8e756403fc24ab6027f6224b09bea..4c2522e483749d84a1908ad227342650c7107d22 100644
--- a/webrtc/build/common.gypi
+++ b/webrtc/build/common.gypi
@@ -223,7 +223,7 @@
           '<(DEPTH)',
           # The overrides must be included before the WebRTC root as that's the
           # mechanism for selecting the override headers in Chromium.
-          '../overrides',
+          '../../webrtc_overrides',
           # The WebRTC root is needed to allow includes in the WebRTC code base
           # to be prefixed with webrtc/.
           '../..',
@@ -404,9 +404,9 @@
             'WEBRTC_CHROMIUM_BUILD',
           ],
           'include_dirs': [
-            # overrides must be included first as that is the mechanism for
+            # The overrides must be included first as that is the mechanism for
             # selecting the override headers in Chromium.
-            '../overrides',
+            '../../webrtc_overrides',
             '../..',
           ],
         }, {