[SkSVGDevice] Initial text support

src/animator/SkXMLAnimatorWriter.h

Index: src/animator/SkXMLAnimatorWriter.h
diff --git a/src/animator/SkXMLAnimatorWriter.h b/src/animator/SkXMLAnimatorWriter.h
index 1b17f6ffd63c170f054ab86e9ae7425a10b1c456..9cb596628da7a95be693bf242e2fa614a005397b 100644
--- a/src/animator/SkXMLAnimatorWriter.h
+++ b/src/animator/SkXMLAnimatorWriter.h
@@ -25,6 +25,8 @@ protected:
     virtual void onAddAttributeLen(const char name[], const char value[], size_t length);
     virtual void onEndElement();
     virtual void onStartElementLen(const char elem[], size_t length);
+    virtual void onAddText(const char text[]) SK_OVERRIDE;
+
 private:
     SkAnimator* fAnimator;
     SkDisplayXMLParser* fParser;