IDocument: Make mimeType a value member

Change-Id: I2e90ccf0a45ae8d00bcd00ec77fe0d9776f2f119
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/qmlprojectmanager/qmlprojectfile.cpp

@@ -42,6 +42,7 @@ QmlProjectFile::QmlProjectFile(QmlProject *parent, QString fileName)
     QTC_CHECK(m_project);
     QTC_CHECK(!fileName.isEmpty());
     setId("Qml.ProjectFile");
+    setMimeType(QLatin1String(Constants::QMLPROJECT_MIMETYPE));
     setFilePath(fileName);
 }
 
@@ -64,11 +65,6 @@ QString QmlProjectFile::suggestedFileName() const
     return QString();
 }
 
-QString QmlProjectFile::mimeType() const
-{
-    return QLatin1String(Constants::QMLPROJECT_MIMETYPE);
-}
-
 bool QmlProjectFile::isModified() const
 {
     return false;

src/plugins/qmlprojectmanager/qmlprojectfile.h

@@ -50,7 +50,6 @@ public:
 
     virtual QString defaultPath() const;
     virtual QString suggestedFileName() const;
-    virtual QString mimeType() const;
 
     virtual bool isModified() const;
     virtual bool isSaveAsAllowed() const;