Revert of Update build files to use webrtc_overrides in Chromium instead of overrides. (patchset #2 id:20001 of https://codereview.webrtc.org/1354933002/ )

Reason for revert:
Breaks FYI bots.

ninja: error: '../../third_party/webrtc_overrides/webrtc/base/logging.cc', needed by 'obj/third_party/webrtc_overrides/webrtc/base/rtc_base.logging.o', missing and no known rule to make it

Original issue's description:
> Update build files to use webrtc_overrides in Chromium instead of overrides.
>
> This is a part of moving the overrides to Chromium. See bug comment #65 for all steps.
>
> BUG=chromium:468375
>
> Committed: https://crrev.com/baae0a8a6c873ddf812a5687b84638359b2e7e5b
> Cr-Commit-Position: refs/heads/master@{#9996}

TBR=kjellander@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:468375

Review URL: https://codereview.webrtc.org/1352423002

Cr-Commit-Position: refs/heads/master@{#9998}
diff --git a/webrtc/BUILD.gn b/webrtc/BUILD.gn
index 1096bb4..56d06cf 100644
--- a/webrtc/BUILD.gn
+++ b/webrtc/BUILD.gn
@@ -23,9 +23,9 @@
   if (build_with_chromium) {
     defines = [ "WEBRTC_CHROMIUM_BUILD" ]
     include_dirs = [
-      # The overrides must be included first as that is the mechanism for
+      # overrides must be included first as that is the mechanism for
       # selecting the override headers in Chromium.
-      "../webrtc_overrides",
+      "overrides",
 
       # Allow includes to be prefixed with webrtc/ in case it is not an
       # immediate subdirectory of the top-level.
diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index c4d8a4f..ed0690c 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -332,18 +332,18 @@
 
   if (build_with_chromium) {
     sources += [
-      "../../webrtc_overrides/webrtc/base/logging.cc",
-      "../../webrtc_overrides/webrtc/base/logging.h",
+      "../overrides/webrtc/base/logging.cc",
+      "../overrides/webrtc/base/logging.h",
     ]
 
     deps += [ "..:webrtc_common" ]
 
     if (is_win) {
-      sources += [ "../../webrtc_overrides/webrtc/base/win32socketinit.cc" ]
+      sources += [ "../overrides/webrtc/base/win32socketinit.cc" ]
     }
 
     include_dirs = [
-      "../../webrtc_overrides",
+      "../overrides",
       "../../boringssl/src/include",
     ]
 
diff --git a/webrtc/base/base.gyp b/webrtc/base/base.gyp
index 755cb3f..1536b4f 100644
--- a/webrtc/base/base.gyp
+++ b/webrtc/base/base.gyp
@@ -84,7 +84,7 @@
       'conditions': [
         ['build_with_chromium==1', {
           'include_dirs': [
-            '../../webrtc_overrides',
+            '../overrides',
           ],
           'sources!': [
             'basictypes.h',
@@ -338,9 +338,9 @@
         'worker.h',
         'x11windowpicker.cc',
         'x11windowpicker.h',
-        '../../webrtc_overrides/webrtc/base/logging.cc',
-        '../../webrtc_overrides/webrtc/base/logging.h',
-        '../../webrtc_overrides/webrtc/base/win32socketinit.cc',
+        '../overrides/webrtc/base/logging.cc',
+        '../overrides/webrtc/base/logging.h',
+        '../overrides/webrtc/base/win32socketinit.cc',
       ],
       # TODO(henrike): issue 3307, make rtc_base build without disabling
       # these flags.
@@ -366,7 +366,7 @@
       'conditions': [
         ['build_with_chromium==1', {
           'include_dirs': [
-            '../../webrtc_overrides',
+            '../overrides',
             '../../boringssl/src/include',
           ],
           'sources!': [
@@ -481,9 +481,9 @@
             }],
           ],
           'sources!': [
-            '../../webrtc_overrides/webrtc/base/win32socketinit.cc',
-            '../../webrtc_overrides/webrtc/base/logging.cc',
-            '../../webrtc_overrides/webrtc/base/logging.h',
+            '../overrides/webrtc/base/win32socketinit.cc',
+            '../overrides/webrtc/base/logging.cc',
+            '../overrides/webrtc/base/logging.h',
           ],
         }],
         ['use_openssl==1', {
diff --git a/webrtc/build/common.gypi b/webrtc/build/common.gypi
index 7567fbd..be1451d 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.
-          '../../webrtc_overrides',
+          '../overrides',
           # The WebRTC root is needed to allow includes in the WebRTC code base
           # to be prefixed with webrtc/.
           '../..',
@@ -408,9 +408,9 @@
             'WEBRTC_CHROMIUM_BUILD',
           ],
           'include_dirs': [
-            # The overrides must be included first as that is the mechanism for
+            # overrides must be included first as that is the mechanism for
             # selecting the override headers in Chromium.
-            '../../webrtc_overrides',
+            '../overrides',
             '../..',
           ],
         }, {