Add generic FlameGraphView QML component

This allows us to reduce code duplication, but we first have to put
timeline and flame graph into the same library, so that we can use the
TimelineThere in FlameGraphView.

Change-Id: I72b27ffb1fc5aa6baf6a23d85e5ca6c610896b8c
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/qmlprofiler/flamegraphmodel.cpp

@@ -208,7 +208,6 @@ QVariant FlameGraphModel::lookup(const FlameGraphData &stats, int role) const
     case DurationRole: return stats.duration;
     case CallCountRole: return stats.calls;
     case TimePerCallRole: return stats.duration / stats.calls;
-    case TimeInPercentRole: return stats.duration * 100 / m_stackBottom.duration;
     case AllocationsRole: return stats.allocations;
     case MemoryRole: return stats.memory;
     default: break;
@@ -321,7 +320,6 @@ QHash<int, QByteArray> FlameGraphModel::roleNames() const
         {ColumnRole, "column"},
         {NoteRole, "note"},
         {TimePerCallRole, "timePerCall"},
-        {TimeInPercentRole, "timeInPercent"},
         {RangeTypeRole, "rangeType"},
         {LocationRole, "location" },
         {AllocationsRole, "allocations" },