First step towards dynamic ui completion. Add hooks in cppmodelmanager

This adds a way for plugins to tell the cppmodel that for certain files,
the actual contents come from it, instead of reading from the disk.
(For texteditors the cppmodel does that automatically.)

Reviewed-By: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/cpptools/cppmodelmanager.h

@@ -91,6 +91,9 @@ public:
     void stopEditorSelectionsUpdate()
     { m_updateEditorSelectionsTimer->stop(); }
 
+    virtual void addEditorSupport(AbstractEditorSupport *editorSupport);
+    virtual void removeEditorSupport(AbstractEditorSupport *editorSupport);
+
 Q_SIGNALS:
     void projectPathChanged(const QString &projectPath);
 
@@ -161,6 +164,8 @@ private:
     // editor integration
     QMap<TextEditor::ITextEditor *, CppEditorSupport *> m_editorSupport;
 
+    QSet<AbstractEditorSupport *> m_addtionalEditorSupport;
+
     // project integration
     QMap<ProjectExplorer::Project *, ProjectInfo> m_projects;