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 8f8d3878fd7f289e06b6cd04786632595b212ec6..1e0bd7373460a2ff077fff42cccffab8d853d075 100644
--- a/android_webview/lib/main/aw_main_delegate.cc
+++ b/android_webview/lib/main/aw_main_delegate.cc
@@ -78,14 +78,10 @@ bool AwMainDelegate::BasicStartupComplete(int* exit_code) {
   // Disable compositor touch hit testing for now to mitigate risk of bugs.
   cl->AppendSwitch(cc::switches::kDisableCompositorTouchHitTesting);
 
-  // Disable WebRTC.
-  cl->AppendSwitch(switches::kDisableWebRTC);
-
 #if defined(VIDEO_HOLE)
   // Support EME/L1 with hole-punching.
   cl->AppendSwitch(switches::kMediaDrmEnableNonCompositing);
 #endif
-
   return false;
 }