diff --git a/talk/app/webrtc/webrtcsession_unittest.cc b/talk/app/webrtc/webrtcsession_unittest.cc
index b6f726b34..956f8a66f 100644
--- a/talk/app/webrtc/webrtcsession_unittest.cc
+++ b/talk/app/webrtc/webrtcsession_unittest.cc
@@ -105,8 +105,6 @@ static const char kClientAddrHost2[] = "22.22.22.22";
 static const char kStunAddrHost[] = "99.99.99.1";
 static const SocketAddress kTurnUdpIntAddr("99.99.99.4", 3478);
 static const SocketAddress kTurnUdpExtAddr("99.99.99.6", 0);
-static const char kTurnUsername[] = "test";
-static const char kTurnPassword[] = "test";
 
 static const char kSessionVersion[] = "1";
 
diff --git a/talk/build/common.gypi b/talk/build/common.gypi
index 63ad9abf6..8261c2085 100644
--- a/talk/build/common.gypi
+++ b/talk/build/common.gypi
@@ -86,6 +86,9 @@
         'conditions': [
           ['clang==1', {
             'cflags': [
+              '-Wall',
+              '-Wextra',
+              '-Wunused-variable',
               # TODO(ronghuawu): Fix the warning caused by
               # LateBindingSymbolTable::TableInfo from
               # latebindingsymboltable.cc.def and remove below flag.