Clang: use HighlightingMarks for hover with Ctrl highlighting

Make this highlighting work without builtin code model
but based on the HighlightingMarks that we already have
from ClangCodeModel.
Redundant parameters are removed by this change.

Change-Id: I73b5dab46ba59d2f813236831818f0a9bc94c5bc
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>

src/plugins/cpptools/baseeditordocumentprocessor.h

@@ -76,7 +76,7 @@ public:
     virtual void setParserConfig(const BaseEditorDocumentParser::Configuration config);
 
     virtual QFuture<CursorInfo> cursorInfo(const CursorInfoParams &params) = 0;
-    virtual QFuture<SymbolInfo> requestFollowSymbol(int line, int column, bool resolveTarget) = 0;
+    virtual QFuture<SymbolInfo> requestFollowSymbol(int line, int column) = 0;
 
 public:
     using HeaderErrorDiagnosticWidgetCreator = std::function<QWidget*()>;

src/plugins/cpptools/builtineditordocumentprocessor.h

@@ -52,7 +52,7 @@ public:
     bool isParserRunning() const override;
 
     QFuture<CursorInfo> cursorInfo(const CursorInfoParams &params) override;
-    QFuture<SymbolInfo> requestFollowSymbol(int, int, bool) override
+    QFuture<SymbolInfo> requestFollowSymbol(int, int) override
     { return QFuture<SymbolInfo>(); }
 
 private:

src/plugins/cpptools/cppsymbolinfo.h

@@ -39,7 +39,6 @@ public:
     int endLine = 0;
     int endColumn = 0;
     QString fileName;
-    bool failedToFollow = false;
 };
 
 } // namespace CppTools