QmlProfiler: Remove some useless signals and QML variables

We don't want to emit a signal for each event being added. That's
expensive and doesn't serve any purpose. We also don't have to save
the availability of data in QML as it isn't used anywhere.

Change-Id: I32db06a1955a7cfd6b569f50b81bf5278333b622
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/qmlprofilermodelmanager.cpp

@@ -148,6 +148,7 @@ public:
     QVector <int> partialCountWeights;
     int totalWeight;
     double progress;
+    double previousProgress;
     qint64 estimatedTime;
 
     // file to load
@@ -227,7 +228,11 @@ void QmlProfilerModelManager::modelProxyCountUpdated(int proxyId, qint64 count,
 
     d->progress += d->partialCounts[proxyId] * d->partialCountWeights[proxyId] /
             d->totalWeight;
-    emit progressChanged();
+
+    if (d->progress - d->previousProgress > 0.01) {
+        d->previousProgress = d->progress;
+        emit progressChanged();
+    }
 }
 
 qint64 QmlProfilerModelManager::estimatedProfilingTime() const
@@ -258,7 +263,6 @@ void QmlProfilerModelManager::addQmlEvent(int type,
 
     QTC_ASSERT(state() == QmlProfilerDataState::AcquiringData, /**/);
     d->model->addQmlEvent(type, bindingType, startTime, length, data, location, ndata1, ndata2, ndata3, ndata4, ndata5);
-    emit countChanged();
 }
 
 void QmlProfilerModelManager::addV8Event(int depth, const QString &function, const QString &filename,
@@ -374,11 +378,11 @@ void QmlProfilerModelManager::clear()
     for (int i = 0; i < d->partialCounts.count(); i++)
         d->partialCounts[i] = 0;
     d->progress = 0;
+    d->previousProgress = 0;
     d->model->clear();
     d->v8Model->clear();
     d->traceTime->clear();
 
-    emit countChanged();
     setState(QmlProfilerDataState::Empty);
 }