AutoTest: Remove duplicated icons

This change makes AutoTest reuse the equivalent icons from CPlusPlus.

Change-Id: I01f8c30798c7f1b622469ae1f25418e9d1bd8a93
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/autotest/autotest.qrc

 <RCC>
     <qresource prefix="/">
         <file>images/autotest.png</file>
-        <file>images/class.png</file>
-        <file>images/func.png</file>
         <file>images/expand.png</file>
         <file>images/expand@2x.png</file>
         <file>images/collapse.png</file>

src/plugins/autotest/testtreeitem.cpp

@@ -33,6 +33,8 @@
 
 #include <texteditor/texteditor.h>
 
+#include <cplusplus/Icons.h>
+
 namespace Autotest {
 namespace Internal {
 
@@ -51,8 +53,8 @@ static QIcon testTreeIcon(TestTreeItem::Type type)
 {
     static QIcon icons[] = {
         QIcon(),
-        QIcon(QLatin1String(":/images/class.png")),
-        QIcon(QLatin1String(":/images/func.png")),
+        CPlusPlus::Icons::iconForType(CPlusPlus::Icons::ClassIconType),
+        CPlusPlus::Icons::iconForType(CPlusPlus::Icons::SlotPrivateIconType),
         QIcon(QLatin1String(":/images/data.png"))
     };