media: Use stl utilities from the base namespace

media/cast/sender/audio_encoder.cc

Index: media/cast/sender/audio_encoder.cc
diff --git a/media/cast/sender/audio_encoder.cc b/media/cast/sender/audio_encoder.cc
index 37410a68bee2e4cfa2e1dc801aa53f7050617122..aa1aa9422715b178e0e4b144180c1e470035e2ef 100644
--- a/media/cast/sender/audio_encoder.cc
+++ b/media/cast/sender/audio_encoder.cc
@@ -292,7 +292,8 @@ class AudioEncoder::OpusImpl : public AudioEncoder::ImplBase {
     out->resize(kOpusMaxPayloadSize);
     const opus_int32 result = opus_encode_float(
         opus_encoder_, buffer_.get(), samples_per_frame_,
-        reinterpret_cast<uint8_t*>(string_as_array(out)), kOpusMaxPayloadSize);
+        reinterpret_cast<uint8_t*>(base::string_as_array(out)),
+        kOpusMaxPayloadSize);
     if (result > 1) {
       out->resize(result);
       return true;