Oilpan: Fix build after MIDI changes.

TBR=haraken@chromium.org, oilpan-reviews@chromium.org, yhirano@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/205693004

git-svn-id: svn://svn.chromium.org/blink/trunk@169731 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -235,7 +235,7 @@ void MIDIAccess::resolve()
     m_asyncResolveRunner.runAsync();
 }
 
-void MIDIAccess::reject(PassRefPtr<DOMError> error)
+void MIDIAccess::reject(PassRefPtrWillBeRawPtr<DOMError> error)
 {
     m_error = error;
     m_asyncRejectRunner.runAsync();
@@ -248,7 +248,8 @@ void MIDIAccess::resolveNow()
 
 void MIDIAccess::rejectNow()
 {
-    m_resolver->reject(m_error.release().get(), executionContext());
+    m_resolver->reject(m_error.get(), executionContext());
+    m_error.clear();
 }
 
 void MIDIAccess::doPostAction(State state)
@@ -267,6 +268,7 @@ void MIDIAccess::trace(Visitor* visitor)
 {
     visitor->trace(m_inputs);
     visitor->trace(m_outputs);
+    visitor->trace(m_error);
 }
 
 } // namespace WebCore

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

@@ -102,7 +102,7 @@ private:
     void permissionDenied();
 
     void resolve();
-    void reject(PassRefPtr<DOMError>);
+    void reject(PassRefPtrWillBeRawPtr<DOMError>);
     void resolveNow();
     void rejectNow();
     // Called when the promise is resolved or rejected.
@@ -118,7 +118,7 @@ private:
     bool m_sysExEnabled;
     AsyncMethodRunner<MIDIAccess> m_asyncResolveRunner;
     AsyncMethodRunner<MIDIAccess> m_asyncRejectRunner;
-    RefPtr<DOMError> m_error;
+    RefPtrWillBeMember<DOMError> m_error;
 };
 
 } // namespace WebCore