Enable webrtc for webview.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 594b9a21e6aeef80ccc4be111195fa9d5409f0d8..76cf67cf87f88f84edb0bafb86faa1cdd0a868c9 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -654,17 +654,10 @@
           'enable_autofill_dialog%': 1
         }],
 
-        ['OS=="android" and android_webview_build==0', {
+        ['OS=="android"', {
           'enable_webrtc%': 1,
         }],
 
-        # Disable WebRTC for building WebView as part of Android system.
-        # TODO(boliu): Decide if we want WebRTC, and if so, also merge
-        # the necessary third_party repositories.
-        ['OS=="android" and android_webview_build==1', {
-          'enable_webrtc%': 0,
-        }],
-
         ['OS=="ios"', {
           'disable_ftp_support%': 1,
           'enable_automation%': 0,