Apply OwnPtr|PassOwnPtr to handle member variables and arguments in MIDIClient

Source/modules/webmidi/MIDIController.cpp

Index: Source/modules/webmidi/MIDIController.cpp
diff --git a/Source/modules/webmidi/MIDIController.cpp b/Source/modules/webmidi/MIDIController.cpp
index 6d3ad053b4efcd8e54e34c016108a9b3cd17082c..55cc3996ea63a69c1e082512a75064b7080a9a51 100644
--- a/Source/modules/webmidi/MIDIController.cpp
+++ b/Source/modules/webmidi/MIDIController.cpp
@@ -41,17 +41,17 @@ const char* MIDIController::supplementName()
     return "MIDIController";
 }
 
-MIDIController::MIDIController(MIDIClient* client)
+MIDIController::MIDIController(PassOwnPtr<MIDIClient> client)
     : m_client(client)
 {
-    ASSERT(client);
+    ASSERT(m_client);

[gyuyoung-inactive, 2014/04/03 06:30:11]

I missed that client becomes a null after passing ownership to m_client. So, I
change to check assertion with m_client.

 }
 
 MIDIController::~MIDIController()
 {
 }
 
-PassOwnPtr<MIDIController> MIDIController::create(MIDIClient* client)
+PassOwnPtr<MIDIController> MIDIController::create(PassOwnPtr<MIDIClient> client)
 {
     return adoptPtr(new MIDIController(client));
 }
@@ -66,7 +66,7 @@ void MIDIController::cancelSysexPermissionRequest(MIDIAccess* access)
     m_client->cancelSysexPermissionRequest(access);
 }
 
-void provideMIDITo(Page& page, MIDIClient* client)
+void provideMIDITo(Page& page, PassOwnPtr<MIDIClient> client)
 {
     MIDIController::provideTo(page, MIDIController::supplementName(), MIDIController::create(client));
 }