Fix clang warning in peerconnection_jni.cc

TEST= export GYP_DEFINES="OS=android clang=1" ...
      ninja -C out/Debug AppRTCDemo
BUG=webrtc:5399

Review URL: https://codereview.webrtc.org/1561073005

Cr-Commit-Position: refs/heads/master@{#11181}
diff --git a/talk/app/webrtc/java/jni/peerconnection_jni.cc b/talk/app/webrtc/java/jni/peerconnection_jni.cc
index 4757484..5e90043 100644
--- a/talk/app/webrtc/java/jni/peerconnection_jni.cc
+++ b/talk/app/webrtc/java/jni/peerconnection_jni.cc
@@ -547,7 +547,7 @@
  protected:
   // Common implementation for failure of Set & Create types, distinguished by
   // |op| being "Set" or "Create".
-  void OnFailure(const std::string& op, const std::string& error) {
+  void DoOnFailure(const std::string& op, const std::string& error) {
     jmethodID m = GetMethodID(jni(), *j_observer_class_, "on" + op + "Failure",
                               "(Ljava/lang/String;)V");
     jstring j_error_string = JavaStringFromStdString(jni(), error);
@@ -574,7 +574,7 @@
 
   void OnFailure(const std::string& error) override {
     ScopedLocalRefFrame local_ref_frame(jni());
-    SdpObserverWrapper::OnFailure(std::string("Create"), error);
+    SdpObserverWrapper::DoOnFailure(std::string("Create"), error);
   }
 };
 
@@ -587,7 +587,7 @@
 
   void OnFailure(const std::string& error) override {
     ScopedLocalRefFrame local_ref_frame(jni());
-    SdpObserverWrapper::OnFailure(std::string("Set"), error);
+    SdpObserverWrapper::DoOnFailure(std::string("Set"), error);
   }
 };
 
diff --git a/talk/libjingle.gyp b/talk/libjingle.gyp
index 04da73f..bc7c0b4 100755
--- a/talk/libjingle.gyp
+++ b/talk/libjingle.gyp
@@ -62,13 +62,6 @@
             '<(libyuv_dir)/include',
           ],
           'conditions': [
-            ['clang==1', {
-              'cflags': [
-                # Disabled due to failing when compiled with -Wall, see
-                # https://bugs.chromium.org/p/webrtc/issues/detail?id=5399
-                '-Wno-overloaded-virtual',
-              ],
-            }],
             ['OS=="linux"', {
               'defines': [
                 'HAVE_GTK',