Revert r253110: "Enable webrtc for webview."

android_webview/lib/main/aw_main_delegate.cc

Index: android_webview/lib/main/aw_main_delegate.cc
diff --git a/android_webview/lib/main/aw_main_delegate.cc b/android_webview/lib/main/aw_main_delegate.cc
index c11f7a032cf5c2107e7fecd3fe5421896237b975..a9573a1a9fa14b53c24923f427b93f3d5c6995c5 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -73,10 +73,14 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
   // Fullscreen video with subtitle is not yet supported.
   cl->AppendSwitch(switches::kDisableOverlayFullscreenVideoSubtitle);
 
+  // Disable WebRTC.
+  cl->AppendSwitch(switches::kDisableWebRTC);
+
 #if defined(VIDEO_HOLE)
   // Support EME/L1 with hole-punching.
   cl->AppendSwitch(switches::kMediaDrmEnableNonCompositing);
 #endif
+
   return false;
 }