Debugger: Use QElapsedTimer instead of QTime::elapsed()

Deprecation looming.

Change-Id: Ibafbac6fbe48d74ba7d88c22400d581e49e4e45d
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/plugins/debugger/cdb/cdbengine.cpp

@@ -324,12 +324,9 @@ static QStringList mergeEnvironment(QStringList runConfigEnvironment,
     return runConfigEnvironment;
 }
 
-int CdbEngine::elapsedLogTime() const
+int CdbEngine::elapsedLogTime()
 {
-    const int elapsed = m_logTime.elapsed();
-    const int delta = elapsed - m_elapsedLogTime;
-    m_elapsedLogTime = elapsed;
-    return delta;
+    return m_logTimer.restart();
 }
 
 void CdbEngine::createFullBacktrace()
@@ -352,8 +349,8 @@ void CdbEngine::setupEngine()
         qDebug(">setupEngine");
 
     init();
-    if (!m_logTime.elapsed())
-        m_logTime.start();
+    if (!m_logTimer.elapsed())
+        m_logTimer.start();
 
     // Console: Launch the stub with the suspended application and attach to it
     // CDB in theory has a command line option '-2' that launches a

src/plugins/debugger/cdb/cdbengine.h

@@ -32,7 +32,7 @@
 
 #include <projectexplorer/devicesupport/idevice.h>
 
-#include <QTime>
+#include <QElapsedTimer>
 
 namespace Debugger {
 namespace Internal {
@@ -195,7 +195,7 @@ private:
     NormalizedSourceFileName sourceMapNormalizeFileNameFromDebugger(const QString &f);
     void doUpdateLocals(const UpdateParameters &params) override;
     void updateAll() override;
-    int elapsedLogTime() const;
+    int elapsedLogTime();
     unsigned parseStackTrace(const GdbMi &data, bool sourceStepInto);
     void mergeStartParametersSourcePathMap();
 
@@ -223,8 +223,7 @@ private:
         wow64Stack32Bit,
         wow64Stack64Bit
     } m_wow64State = wow64Uninitialized;
-    QTime m_logTime;
-    mutable int m_elapsedLogTime = 0;
+    QElapsedTimer m_logTimer;
     QString m_extensionMessageBuffer;
     bool m_sourceStepInto = false;
     int m_watchPointX = 0;