Remove binding dependency on QQmlExpression

This is the first step to creating much lighter weight bindings that
are tuned for the specific scenario in which they're used.

Change-Id: Ib985dcff25679b711b5c634bbc891aa7902bf405
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>

src/qml/debugger/qqmlenginedebugservice.cpp

@@ -577,10 +577,8 @@ void QQmlEngineDebugService::setBinding(int objectId,
                     QQmlPropertyPrivate::setSignalExpression(property, qmlExpression);
                     qmlExpression->setSourceLocation(filename, line, column);
                 } else if (property.isProperty()) {
-                    QQmlBinding *binding = new QQmlBinding(expression.toString(), object, context);
+                    QQmlBinding *binding = new QQmlBinding(expression.toString(), false, object, QQmlContextData::get(context), filename, line, column);;
                     binding->setTarget(property);
-                    binding->setSourceLocation(filename, line, column);
-                    binding->setNotifyOnValueChanged(true);
                     QQmlAbstractBinding *oldBinding = QQmlPropertyPrivate::setBinding(property, binding);
                     if (oldBinding)
                         oldBinding->destroy();

src/qml/qml/qml.pri

@@ -64,7 +64,6 @@ HEADERS += \
     $$PWD/qqml.h \
     $$PWD/qquickapplication_p.h \
     $$PWD/qqmlbinding_p.h \
-    $$PWD/qqmlbinding_p_p.h \
     $$PWD/qqmlproperty.h \
     $$PWD/qqmlcomponent.h \
     $$PWD/qqmlcomponent_p.h \

src/qml/qml/qqmlabstractbinding.cpp

@@ -41,6 +41,7 @@
 
 #include "qqmlabstractbinding_p.h"
 
+#include <QtQml/qqmlinfo.h>
 #include <private/qqmlbinding_p.h>
 #include <private/qqmlvaluetypeproxybinding_p.h>
 
@@ -154,6 +155,12 @@ void QQmlAbstractBinding::removeFromObject()
     }
 }
 
+void QQmlAbstractBinding::printBindingLoopError(QQmlProperty &prop)
+{
+    qmlInfo(prop.object()) << QString(QLatin1String("Binding loop detected for property \"%1\"")).arg(prop.name());
+}
+
+
 static void bindingDummyDeleter(QQmlAbstractBinding *)
 {
 }

src/qml/qml/qqmlabstractbinding_p.h

@@ -92,6 +92,7 @@ class Q_QML_PRIVATE_EXPORT QQmlAbstractBinding
     void removeFromObject();
 
     static inline Pointer getPointer(QQmlAbstractBinding *p);
+    static void printBindingLoopError(QQmlProperty &prop);
 
 protected:
     virtual ~QQmlAbstractBinding();