Update uses of UTF conversions in content/ to use the base:: namespace.

content/renderer/media/midi_message_filter.cc

Index: content/renderer/media/midi_message_filter.cc
diff --git a/content/renderer/media/midi_message_filter.cc b/content/renderer/media/midi_message_filter.cc
index d114618ec60c6f495098728edf1f5d0c04c0a882..992c46eee515ee67797d80130cd3ebaccc90502d 100644
--- a/content/renderer/media/midi_message_filter.cc
+++ b/content/renderer/media/midi_message_filter.cc
@@ -123,18 +123,18 @@ void MIDIMessageFilter::HandleSessionStarted(
     // Add the client's input and output ports.
     for (size_t i = 0; i < inputs.size(); ++i) {
       client->didAddInputPort(
-          UTF8ToUTF16(inputs[i].id),
-          UTF8ToUTF16(inputs[i].manufacturer),
-          UTF8ToUTF16(inputs[i].name),
-          UTF8ToUTF16(inputs[i].version));
+          base::UTF8ToUTF16(inputs[i].id),
+          base::UTF8ToUTF16(inputs[i].manufacturer),
+          base::UTF8ToUTF16(inputs[i].name),
+          base::UTF8ToUTF16(inputs[i].version));
     }
 
     for (size_t i = 0; i < outputs.size(); ++i) {
       client->didAddOutputPort(
-          UTF8ToUTF16(outputs[i].id),
-          UTF8ToUTF16(outputs[i].manufacturer),
-          UTF8ToUTF16(outputs[i].name),
-          UTF8ToUTF16(outputs[i].version));
+          base::UTF8ToUTF16(outputs[i].id),
+          base::UTF8ToUTF16(outputs[i].manufacturer),
+          base::UTF8ToUTF16(outputs[i].name),
+          base::UTF8ToUTF16(outputs[i].version));
     }
   }
   client->didStartSession(success);