Migrate WTF::HashSet::add() to ::insert() [part 1 of N]

third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp

Index: third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp
diff --git a/third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp b/third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp
index 6cca9d5b461359c952935920f183b4e02f985c3e..19168245888764d276221bf0a5088fda03d7582f 100644
--- a/third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp
+++ b/third_party/WebKit/Source/modules/webmidi/MIDIAccess.cpp
@@ -110,7 +110,7 @@ MIDIInputMap* MIDIAccess::inputs() const {
     MIDIInput* input = m_inputs[i];
     if (input->getState() != PortState::DISCONNECTED) {
       inputs.push_back(input);
-      ids.add(input->id());
+      ids.insert(input->id());
     }
   }
   if (inputs.size() != ids.size()) {
@@ -127,7 +127,7 @@ MIDIOutputMap* MIDIAccess::outputs() const {
     MIDIOutput* output = m_outputs[i];
     if (output->getState() != PortState::DISCONNECTED) {
       outputs.push_back(output);
-      ids.add(output->id());
+      ids.insert(output->id());
     }
   }
   if (outputs.size() != ids.size()) {