Made symbol searching plug-able through indexing support.

The indexing support for the built-in code model is moved to its own
file. Symbol searching will now call for a searcher through that support
interface, which will create a fully configured and ready-to-go searcher
that can be started in the/a future.

Change-Id: Idc3ee1c7c789a69fa05ee1d42415313dcea94cf8
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/plugins/cpptools/builtinindexingsupport.h

@@ -0,0 +1,33 @@
+#ifndef BUILTININDEXINGSUPPORT_H
+#define BUILTININDEXINGSUPPORT_H
+
+#include "cppindexingsupport.h"
+#include "ModelManagerInterface.h"
+
+#include <QFutureSynchronizer>
+
+namespace CppTools {
+namespace Internal {
+
+class BuiltinIndexingSupport: public CppIndexingSupport {
+public:
+    typedef CPlusPlus::CppModelManagerInterface::WorkingCopy WorkingCopy;
+
+public:
+    BuiltinIndexingSupport(const char *m_pp_configuration_file);
+    ~BuiltinIndexingSupport();
+
+    virtual QFuture<void> refreshSourceFiles(const QStringList &sourceFiles);
+    virtual SymbolSearcher *createSymbolSearcher(SymbolSearcher::Parameters parameters, QSet<QString> fileNames);
+
+private:
+    const char *m_pp_configuration_file;
+    QFutureSynchronizer<void> m_synchronizer;
+    unsigned m_revision;
+    bool m_dumpFileNameWhileParsing;
+};
+
+} // namespace Internal
+} // namespace CppTools
+
+#endif // BUILTININDEXINGSUPPORT_H