CppTools: Remove all references to the tool chain in the project part

Change-Id: I5fd55eadf94c8a185c2082b93b27bf4432e5cabf
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/cpptools/projectpartbuilder.h

@@ -31,6 +31,10 @@
 #include "projectinfo.h"
 #include "projectpart.h"
 
+namespace ProjectExplorer {
+class ToolChain;
+}
+
 namespace CppTools {
 
 class CPPTOOLS_EXPORT ProjectPartBuilder
@@ -51,6 +55,11 @@ public:
 
     QList<Core::Id> createProjectPartsForFiles(const QStringList &files);
 
+    static void evaluateProjectPartToolchain(ProjectPart *projectPart,
+                                             const ProjectExplorer::ToolChain *toolChain,
+                                             const QStringList &commandLineFlags,
+                                             const Utils::FileName &sysRoot);
+
 private:
     void createProjectPart(const QStringList &theSources, const QString &partName,
                            ProjectPart::LanguageVersion languageVersion,