Fix URL encode issue.

examples/encoding.h

@@ -0,0 +1,12 @@
+#ifndef ENCODING_H_
+#define ENCODING_H_
+
+#include <string>
+
+// Convert UTF16 to UTF8.
+std::string Utf16ToUtf8(const std::wstring& utf16_string);
+
+// Convert UTF8 to UTF16.
+std::wstring Utf8ToUtf16(const std::string& utf8_string);
+
+#endif  // ENCODING_H_