Added a query function for whether submodules are enabled

webrtc/modules/audio_processing/echo_control_mobile_impl.cc

Index: webrtc/modules/audio_processing/echo_control_mobile_impl.cc
diff --git a/webrtc/modules/audio_processing/echo_control_mobile_impl.cc b/webrtc/modules/audio_processing/echo_control_mobile_impl.cc
index 2d5ba35c3487138f562d6f05b05ccd3c2a5b3279..97f69974dbadd58e3864e3619d204847c3bfbec7 100644
--- a/webrtc/modules/audio_processing/echo_control_mobile_impl.cc
+++ b/webrtc/modules/audio_processing/echo_control_mobile_impl.cc
@@ -278,6 +278,12 @@ int EchoControlMobileImpl::Enable(bool enable) {
   return AudioProcessing::kNoError;
 }
 
+bool EchoControlMobileImpl::is_enabled_render_side_query() const {
+  // TODO(peah): Add threadchecker.
+  rtc::CritScope cs_render(crit_render_);
+  return enabled_;
+}
+
 bool EchoControlMobileImpl::is_enabled() const {
   rtc::CritScope cs(crit_capture_);
   return enabled_;