Remove no-non-virtual-dtor flag

BZ: 111473

The warning non-virtual-dtor should not be ignored for the whole project, but
only in the few cases where it it necessary.

Change-Id: I0ede82a30f2cd055b789f7fb56104fb227934e6f
Signed-off-by: Sebastien Gonzalve <sebastien.gonzalve@intel.com>
Signed-off-by: Guilhem IMBERTON <guilhem.imberton@intel.com>
Reviewed-on: http://android.intel.com:8080/110191
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
diff --git a/xmlserializer/Android.mk b/xmlserializer/Android.mk
index 6d2770c..8ddb700 100644
--- a/xmlserializer/Android.mk
+++ b/xmlserializer/Android.mk
@@ -18,8 +18,6 @@
 
 COMMON_MODULE_TAGS := optional
 
-COMMON_CFLAGS := -Wno-non-virtual-dtor
-
 COMMON_C_INCLUDES := \
     external/libxml2/include/ \
     external/webkit/Source/WebCore/icu/ \
diff --git a/xmlserializer/XmlDocSink.h b/xmlserializer/XmlDocSink.h
index e1b2fc3..d341ecf 100644
--- a/xmlserializer/XmlDocSink.h
+++ b/xmlserializer/XmlDocSink.h
@@ -34,6 +34,7 @@
 
     // Source processing
     bool process(CXmlDocSource& xmlDocSource, CXmlSerializingContext& serializingContext);
+    virtual ~CXmlDocSink() {}
 
 private:
     // Handle for subclasses to process the source
diff --git a/xmlserializer/XmlSink.h b/xmlserializer/XmlSink.h
index 0d09a1d..dfa0686 100644
--- a/xmlserializer/XmlSink.h
+++ b/xmlserializer/XmlSink.h
@@ -31,4 +31,7 @@
 {
 public:
     virtual bool fromXml(const CXmlElement& xmlElement, CXmlSerializingContext& serializingContext) = 0;
+
+protected:
+    virtual ~IXmlSink() {}
 };
diff --git a/xmlserializer/XmlSource.h b/xmlserializer/XmlSource.h
index 818298d..1a7c52e 100644
--- a/xmlserializer/XmlSource.h
+++ b/xmlserializer/XmlSource.h
@@ -31,4 +31,7 @@
 {
 public:
     virtual void toXml(CXmlElement& xmlElement, CXmlSerializingContext& serializingContext) const = 0;
+
+protected:
+    virtual ~IXmlSource() {}
 };