C++: improve support for anonymous classes

Fix:
* highlighting
* find usages
* follow symbol
* code completion

Task-number: QTCREATORBUG-6497
Task-number: QTCREATORBUG-8963
Task-number: QTCREATORBUG-3610
Task-number: QTCREATORBUG-7579

Change-Id: I3dcaf1c515d0199c3e6bee72284fbb40064686ee
Reviewed-by: Petar Perisin <petar.perisin@gmail.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/3rdparty/cplusplus/Names.h

@@ -253,6 +253,29 @@ private:
     bool _hasArguments;
 };
 
+class CPLUSPLUS_EXPORT AnonymousNameId: public Name
+{
+public:
+    AnonymousNameId(unsigned classTokenIndex);
+    virtual ~AnonymousNameId();
+
+    unsigned classTokenIndex() const;
+
+    virtual const Identifier *identifier() const;
+    virtual bool isEqualTo(const Name *other) const;
+
+    virtual const AnonymousNameId *asAnonymousNameId() const
+    { return this; }
+
+protected:
+    virtual void accept0(NameVisitor *visitor) const;
+
+private:
+    unsigned _classTokenIndex;
+};
+
+
+
 } // namespace CPlusPlus
 
 #endif // CPLUSPLUS_NAMES_H